Bump app version to 0.5.1 and add auto-update support

- Implemented auto-update logic in `ScribeTopBar` with update notification and user interaction.
- Integrated `@tauri-apps/plugin-updater` and `@tauri-apps/plugin-process` for updater functionality.
- Added automatic migration feature with `autoMigrateElectron` support and UI feedback.
- Refactored app architecture with new routing, components, and layout for better modularity.
- Enhanced JSON response handling in API client for robust data parsing.
- Updated locales to include new translations for update and migration-related UI.

lib/api/client.ts

@@ -25,7 +25,11 @@ async function handleResponse<T>(response: Response): Promise<T> {
         const body = await response.json().catch(() => ({message: response.statusText}));
         throw new ApiError(body.message || body || response.statusText, response.status);
     }
-    return response.json() as Promise<T>;
+    const contentType = response.headers.get('content-type') ?? '';
+    if (contentType.includes('application/json')) {
+        return response.json() as Promise<T>;
+    }
+    return response.text() as unknown as Promise<T>;
 }
 
 export async function apiGet<T>(url: string, auth: string, lang: string = "fr", params: Record<string, unknown> = {}): Promise<T> {