feat: Implement push notification system for admin announcements

- Add a notification manager to handle push notifications and integrate with Nostr events.
- Create a push notification service to manage subscription and permission requests.
- Introduce components for notification settings and permission prompts in the UI.
- Update Nostr store to manage push notification state and enable/disable functionality.
- Enhance NostrFeed to send notifications for new admin announcements.
- Implement test notification functionality for development purposes.

vite.config.ts

@@ -17,9 +17,10 @@ export default defineConfig(({ mode }) => ({
       devOptions: {
         enabled: true
       },
+      strategies: 'injectManifest',
+      srcDir: 'public',
+      filename: 'sw.js',
       workbox: {
-        clientsClaim: true,
-        skipWaiting: true,
         globPatterns: [
           '**/*.{js,css,html,ico,png,svg}'
         ]