Updated Serbian translation and ignore list (#3844)

This PR completes the Serbian translation file
(`messages_sr_LATN_RS.properties`) to 100%, as of this moment.

Also updated `ignore_translation.toml` to reflect which lines should be
skipped during validation.

Please deploy the test instance as mentioned. Thanks!


---

## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/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/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] 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/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/DeveloperGuide.md#6-testing)
for more details.

---------

Co-authored-by: root <root@ubuntu-22.bxy.rs>

scripts/ignore_translation.toml

@@ -859,8 +859,28 @@ ignore = [
 [sr_LATN_RS]
 ignore = [
     'language.direction',
-    'licenses.version',
-    'poweredBy',
+    'lang.div',
+    'lang.epo',
+    'lang.hin',
+    'lang.iku',
+    'lang.mar',
+    'lang.san',
+    'lang.snd',
+    'lang.tel',
+    'lang.tgl',
+    'lang.urd',
+    'font',
+    'info',
+    'pro',
+    'team.status',
+    'endpointStatistics.top10',
+    'endpointStatistics.top20',
+    'endpointStatistics.top',
+    'showJS.tags',
+    'validateSignature.status',
+    'audit.dashboard.status',
+    'audit.dashboard.table.id',
+    'audit.dashboard.modal.id',
 ]
 
 [sv_SE]