feat: local album events notification (#22817)

* feat: local album events notification

* pr feedback

* show number of unread notification

server/test/fixtures/notification.stub.ts

@@ -0,0 +1,14 @@
+import { NotificationLevel, NotificationType } from 'src/enum';
+
+export const notificationStub = {
+  albumEvent: {
+    id: 'notification-album-event',
+    type: NotificationType.AlbumInvite,
+    description: 'You have been invited to a shared album',
+    title: 'Album Invitation',
+    createdAt: new Date('2024-01-01'),
+    data: { albumId: 'album-id' },
+    level: NotificationLevel.Success,
+    readAt: null,
+  },
+};