feat: implement auto-update functionality with GitHub integration

- Added AutoUpdater class to manage update checks and downloads.
- Integrated auto-updater in the main process after the main window is created.
- Enhanced preload script to expose update-related IPC channels.
- Created UpdateDialog component to handle user interactions for updates.
- Implemented state management for update status using Pinia store.
- Added localization support for update messages in multiple languages.
- Documented auto-update configuration steps for private GitHub repositories.
- Created .env.example for GitHub token configuration.

src/preload/index.ts

@@ -14,9 +14,19 @@ const mainAvailChannels: string[] = [
   'msgLoadData',
   'msgSaveData',
   'msgExecuteTemplate',
-  'msgFindFilesInFolder'
+  'msgFindFilesInFolder',
+  'msgCheckForUpdates',
+  'msgDownloadUpdate',
+  'msgInstallUpdate'
+]
+const rendererAvailChannels: string[] = [
+  'update-checking',
+  'update-available',
+  'update-not-available',
+  'update-download-progress',
+  'update-downloaded',
+  'update-error'
 ]
-const rendererAvailChannels: string[] = []
 
 contextBridge.exposeInMainWorld('mainApi', {
   send: (channel: string, ...data: any[]): void => {