Implement autoupdater functionality and enhance icon management

- Added a new UpdateNotification component to inform users about available updates and facilitate installation.
- Integrated useAutoUpdater hook for managing update checks and installations.
- Updated package.json with new build and generate scripts for release preparation and key generation.
- Enhanced tauri configuration to support autoupdater with signing keys and endpoints.
- Created scripts for preparing signed releases and updating icons, ensuring a streamlined workflow for asset management.
- Added detailed documentation for autoupdater setup and icon update workflow.

tauri/src-tauri/capabilities/default.json

@@ -10,6 +10,7 @@
     "core:webview:allow-internal-toggle-devtools",
     "shell:allow-open",
     "shell:allow-execute",
-    "shell:allow-spawn"
+    "shell:allow-spawn",
+    "updater:default"
   ]
 }