refactor: move modules under app/ directory and update file paths (#3938)

# Description of Changes

- **What was changed:**
- Renamed top-level directories: `stirling-pdf` → `app/core`, `common` →
`app/common`, `proprietary` → `app/proprietary`.
- Updated all path references in `.gitattributes`, GitHub workflows
(`.github/workflows/*`), scripts (`.github/scripts/*`), `.gitignore`,
Dockerfiles, license files, and template settings to reflect the new
structure.
- Added a new CI job `check-generateOpenApiDocs` to generate and upload
OpenAPI documentation.
- Removed redundant `@Autowired` annotations from `TempFileShutdownHook`
and `UnlockPDFFormsController`.
- Minor formatting and comment adjustments in YAML templates and
resource files.

- **Why the change was made:**
- To introduce a clear `app/` directory hierarchy for core, common, and
proprietary modules, improving organization and maintainability.
- To ensure continuous integration and Docker builds continue to work
seamlessly with the reorganized structure.
- To automate OpenAPI documentation generation as part of the CI
pipeline.

---

## Checklist

### General

- [x] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [x] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [x] I have performed a self-review of my own code
- [x] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.

.github/workflows/build.yml

@@ -1,9 +1,8 @@
-name: Build and Test Workflow
+name: Build repo
 
 on:
-  workflow_dispatch:
-  # push:
-  #   branches: ["main"]
+  push:
+    branches: ["main"]
   pull_request:
     branches: ["main"]
 
@@ -23,24 +22,6 @@ permissions:
   contents: read
 
 jobs:
-  files-changed:
-    name: detect what files changed
-    runs-on: ubuntu-latest
-    timeout-minutes: 3
-    # Map a step output to a job output
-    outputs:
-      build: ${{ steps.changes.outputs.build }}
-      app: ${{ steps.changes.outputs.app }}
-      project: ${{ steps.changes.outputs.project }}
-      openapi: ${{ steps.changes.outputs.openapi }}
-    steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
-
-      - name: Check for file changes
-        uses: dorny/paths-filter@de90cc6fb38fc0963ad72b210f1f284cd68cea36 # v3.0.2
-        id: changes
-        with:
-          filters: ".github/config/.files.yaml"
   build:
     runs-on: ubuntu-latest
 
@@ -56,7 +37,7 @@ jobs:
 
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+        uses: step-security/harden-runner@6c439dc8bdf85cadbbce9ed30d1c7b959517bc49 # v2.12.2
         with:
           egress-policy: audit
 
@@ -69,11 +50,6 @@ jobs:
           java-version: ${{ matrix.jdk-version }}
           distribution: "temurin"
 
-      - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@ac638b010cf58a27ee6c972d7336334ccaf61c96 # v4.4.1
-        with:
-          gradle-version: 8.14
-
       - name: Build with Gradle and spring security ${{ matrix.spring-security }}
         run: ./gradlew clean build
         env:
@@ -124,17 +100,14 @@ jobs:
           if-no-files-found: warn
 
   check-generateOpenApiDocs:
-    if: needs.files-changed.outputs.openapi == 'true'
-    needs: [files-changed, build]
     runs-on: ubuntu-latest
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+        uses: step-security/harden-runner@6c439dc8bdf85cadbbce9ed30d1c7b959517bc49 # v2.12.2
         with:
           egress-policy: audit
 
-      - name: Checkout repository
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Set up JDK 17
         uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00 # v4.7.1
@@ -142,8 +115,7 @@ jobs:
           java-version: "17"
           distribution: "temurin"
 
-      - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@ac638b010cf58a27ee6c972d7336334ccaf61c96 # v4.4.1
+      - uses: gradle/actions/setup-gradle@ac638b010cf58a27ee6c972d7336334ccaf61c96 # v4.4.1
 
       - name: Generate OpenAPI documentation
         run: ./gradlew :stirling-pdf:generateOpenApiDocs
@@ -155,12 +127,10 @@ jobs:
           path: ./SwaggerDoc.json
 
   check-licence:
-    if: needs.files-changed.outputs.build == 'true'
-    needs: [files-changed, build]
     runs-on: ubuntu-latest
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+        uses: step-security/harden-runner@6c439dc8bdf85cadbbce9ed30d1c7b959517bc49 # v2.12.2
         with:
           egress-policy: audit
 
@@ -171,7 +141,7 @@ jobs:
         uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00 # v4.7.1
         with:
           java-version: "17"
-          distribution: "temurin"
+          distribution: "adopt"
 
       - name: check the licenses for compatibility
         run: ./gradlew clean checkLicense
@@ -186,8 +156,6 @@ jobs:
           retention-days: 3
 
   docker-compose-tests:
-    if: needs.files-changed.outputs.project == 'true'
-    needs: files-changed
     # if: github.event_name == 'push' && github.ref == 'refs/heads/main' ||
     #     (github.event_name == 'pull_request' &&
     #     contains(github.event.pull_request.labels.*.name, 'licenses') == false &&
@@ -206,7 +174,7 @@ jobs:
 
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+        uses: step-security/harden-runner@6c439dc8bdf85cadbbce9ed30d1c7b959517bc49 # v2.12.2
         with:
           egress-policy: audit
 
@@ -217,7 +185,7 @@ jobs:
         uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00 # v4.7.1
         with:
           java-version: "17"
-          distribution: "temurin"
+          distribution: "adopt"
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
@@ -232,7 +200,6 @@ jobs:
         with:
           python-version: "3.12"
           cache: 'pip' # caching pip dependencies
-          cache-dependency-path: ./testing/cucumber/requirements.txt
 
       - name: Pip requirements
         run: |
@@ -244,69 +211,3 @@ jobs:
           chmod +x ./testing/test.sh
           chmod +x ./testing/test_disabledEndpoints.sh
           ./testing/test.sh
-
-  test-build-docker-images:
-    if: github.event_name == 'pull_request' && needs.files-changed.outputs.project == 'true'
-    needs: [files-changed, build, check-generateOpenApiDocs, check-licence]
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        docker-rev: ["Dockerfile", "Dockerfile.ultra-lite", "Dockerfile.fat"]
-    steps:
-      - name: Harden Runner
-        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
-        with:
-          egress-policy: audit
-
-      - name: Checkout Repository
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
-
-      - name: Set up JDK 17
-        uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00 # v4.7.1
-        with:
-          java-version: "17"
-          distribution: "temurin"
-
-      - name: Set up Gradle
-        uses: gradle/actions/setup-gradle@ac638b010cf58a27ee6c972d7336334ccaf61c96 # v4.4.1
-        with:
-          gradle-version: 8.14
-
-      - name: Build application
-        run: ./gradlew clean build
-        env:
-          DISABLE_ADDITIONAL_FEATURES: true
-          STIRLING_PDF_DESKTOP_UI: false
-
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@29109295f81e9208d7d86ff1c6c12d2833863392 # v3.6.0
-
-      - name: Set up Docker Buildx
-        id: buildx
-        uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
-
-      - name: Build ${{ matrix.docker-rev }}
-        uses: docker/build-push-action@263435318d21b8e681c14492fe198d362a7d2c83 # v6.18.0
-        with:
-          builder: ${{ steps.buildx.outputs.name }}
-          context: .
-          file: ./${{ matrix.docker-rev }}
-          push: false
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
-          platforms: linux/amd64,linux/arm64/v8
-          provenance: true
-          sbom: true
-
-      - name: Upload Reports
-        if: always()
-        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
-        with:
-          name: reports-docker-${{ matrix.docker-rev }}
-          path: |
-            build/reports/tests/
-            build/test-results/
-            build/reports/problems/
-          retention-days: 3
-          if-no-files-found: warn

app/proprietary/src/main/java/stirling/software/proprietary/security/model/exception/AuthenticationFailureException.java

@@ -0,0 +1,13 @@
+package stirling.software.proprietary.security.model.exception;
+
+import org.springframework.security.core.AuthenticationException;
+
+public class AuthenticationFailureException extends AuthenticationException {
+    public AuthenticationFailureException(String message) {
+        super(message);
+    }
+
+    public AuthenticationFailureException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}

app/proprietary/src/main/java/stirling/software/proprietary/security/service/JwtServiceInterface.java

@@ -0,0 +1,90 @@
+package stirling.software.proprietary.security.service;
+
+import java.util.Map;
+
+import org.springframework.security.core.Authentication;
+
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+
+public interface JwtServiceInterface {
+
+    /**
+     * Generate a JWT token for the authenticated user
+     *
+     * @param authentication Spring Security authentication object
+     * @return JWT token as a string
+     */
+    String generateToken(Authentication authentication, Map<String, Object> claims);
+
+    /**
+     * Generate a JWT token for a specific username
+     *
+     * @param username the username for which to generate the token
+     * @param claims additional claims to include in the token
+     * @return JWT token as a string
+     */
+    String generateToken(String username, Map<String, Object> claims);
+
+    /**
+     * Validate a JWT token
+     *
+     * @param token the JWT token to validate
+     * @return true if token is valid, false otherwise
+     */
+    void validateToken(String token);
+
+    /**
+     * Extract username from JWT token
+     *
+     * @param token the JWT token
+     * @return username extracted from token
+     */
+    String extractUsername(String token);
+
+    /**
+     * Extract all claims from JWT token
+     *
+     * @param token the JWT token
+     * @return map of claims
+     */
+    Map<String, Object> extractAllClaims(String token);
+
+    /**
+     * Check if token is expired
+     *
+     * @param token the JWT token
+     * @return true if token is expired, false otherwise
+     */
+    boolean isTokenExpired(String token);
+
+    /**
+     * Extract JWT token from HTTP request (header or cookie)
+     *
+     * @param request HTTP servlet request
+     * @return JWT token if found, null otherwise
+     */
+    String extractTokenFromRequest(HttpServletRequest request);
+
+    /**
+     * Add JWT token to HTTP response (header and cookie)
+     *
+     * @param response HTTP servlet response
+     * @param token JWT token to add
+     */
+    void addTokenToResponse(HttpServletResponse response, String token);
+
+    /**
+     * Clear JWT token from HTTP response (remove cookie)
+     *
+     * @param response HTTP servlet response
+     */
+    void clearTokenFromResponse(HttpServletResponse response);
+
+    /**
+     * Check if JWT authentication is enabled
+     *
+     * @return true if JWT is enabled, false otherwise
+     */
+    boolean isJwtEnabled();
+}