New translations index.mdx (French traditional)

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docs/src/content/docs/fr2/plugins/index.mdx

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+---
+title: Castopod Plugins
+---
+
+import { FileTree, Aside, Tabs, TabItem } from "@astrojs/starlight/components";
+
+Plugins are ways to extend Castopod's core features.
+
+## Plugin folder structure
+
+<FileTree>
+  * hello-world
+    * i18n
+      * en.json
+      * fr.json
+      * …
+    * icon.svg
+    * manifest.json // required
+    * Plugin.php // required
+    * README.md
+</FileTree>
+
+Plugins reside in the `plugins/` directory under a `vendor/` folder, ie. the
+organisation or person who authored the plugin.
+
+<FileTree>
+  * **plugins**
+    * acme
+      * hello-world/
+      * …
+    * atlantis/
+</FileTree>
+
+### Plugin manifest (required)
+
+The plugin manifest is a JSON file containing the plugin's metadata and
+declarations.
+
+This file will determine whether a plugin is valid or not. The minimal required
+data being:
+
+```json
+// manifest.json
+{
+  "name": "acme/hello-world",
+  "version": "1.0.0"
+}
+```
+
+Checkout the [manifest.json reference](./manifest).
+
+### Plugin class (required)
+
+This is where the plugin's logic lives.
+
+The Plugin class extends Castopod's BasePlugin class and implements one or more
+[Hooks](./hooks) (methods) intended to be run throughout Castopod's codebase.
+
+```php
+// Plugin.php
+<?php
+
+declare(strict_types=1);
+
+use Modules\Plugins\Core\BasePlugin;
+
+class AcmeHelloWorldPlugin extends BasePlugin
+{
+    // this rssBeforeChannel method is a Hook
+    public function rssBeforeChannel(Podcast $podcast): void
+    {
+        // …
+    }
+}
+```
+
+<Aside type="note">
+  The Plugin class name is determined by its `vendor/name` pair.\
+  For example, a plugin living under the `acme/hello-world` folder must be named
+  `AcmeHelloWorldPlugin`:
+
+  * the first letter of every word is capitalized (ie. PascalCase)
+  * any special caracter is removed
+  * the `Plugin` suffix is added
+</Aside>
+
+### Plugin README
+
+The `README.md` file is loaded into the plugin's view page for the user to read
+through.\
+It should be used for any additional information to help guide the user in using
+the plugin.
+
+### Plugin icon
+
+The plugin icon is displayed next to its title, it is an SVG file intended to
+give a graphical representation of the plugin.
+
+The icon should be squared, and be legible in a 64px by 64px circle.
+
+### Internationalization (i18n)
+
+Plugins can be translated. Translation strings live inside the `i18n` folder.
+Translation files are JSON files named as locale keys:
+
+<FileTree>
+  * **i18n**
+    * en.json // default locale
+    * fr.json
+    * de.json
+    * …
+</FileTree>
+
+Supported locales are:
+`br`,`ca`,`de`,`en`,`es`,`fr`,`nn-no`,`pl`,`pt-br`,`sr-latn`,`zh-hans`.
+
+The translation strings allow you to translate the title, description and
+settings keys (ie. labels, hints, helpers, etc.).
+
+<Tabs>
+  <TabItem label="English">
+    ```json
+    // i18n/en.json
+    {
+      "title": "Hello, World!",
+      "description": "A Castopod plugin to greet the world!",
+      "settings": {
+        "general": {
+          "field-key": {
+            "label": "Enter a text",
+            "hint": "You can enter any type of character."
+          }
+        },
+        "podcast": {},
+        "episode": {}
+      }
+    }
+    ```
+  </TabItem>
+
+  <TabItem label="French">
+    ```json
+    // i18n/fr.json
+    {
+      "title": "Bonjour, le Monde !",
+      "description": "Un plugin castopod pour saluer le monde !",
+      "settings": {
+        "general": {
+          "field-key": {
+            "label": "Saisissez un texte",
+            "hint": "Vous pouvez saisir n'importe quel type de caractère."
+          }
+        },
+        "podcast": {},
+        "episode": {}
+      }
+    }
+    ```
+  </TabItem>
+</Tabs>