Update v2 announcement dialog (#1481)

[v2
dialog.webm](https://github.com/SharezoneApp/sharezone-app/assets/29028262/b69d72c5-a2c1-4097-bd40-37b826d68845)

Eltern/Lehrer:

|
![Screenshot_1713715765](https://github.com/SharezoneApp/sharezone-app/assets/29028262/001702d5-fb76-4709-b12d-3dd1c18f2fc3)
|
![Screenshot_1713715767](https://github.com/SharezoneApp/sharezone-app/assets/29028262/bc10dec5-ba08-44d5-8e85-dbca254e4d57)
|
| --- | --- |

app/lib/dashboard/dashboard_page.dart

@@ -41,7 +41,7 @@ import 'package:sharezone/navigation/scaffold/sharezone_custom_scaffold.dart';
 import 'package:sharezone/overview/cache/profile_page_hint_cache.dart';
 import 'package:sharezone/settings/src/subpages/changelog_page.dart';
 import 'package:sharezone/settings/src/subpages/my_profile/change_state.dart';
-import 'package:sharezone/sharezone_v2/sz_v2_annoucement_dialog.dart';
+import 'package:sharezone/sharezone_v2/sz_v2_announcement_dialog.dart';
 import 'package:sharezone/timetable/src/widgets/events/calender_event_card.dart';
 import 'package:sharezone/timetable/src/widgets/events/event_view.dart';
 import 'package:sharezone/timetable/timetable_add_event/timetable_add_event_dialog.dart';

app/lib/main/sharezone_app.dart

@@ -50,6 +50,7 @@ import 'package:sharezone/settings/src/subpages/notification.dart';
 import 'package:sharezone/settings/src/subpages/about/about_page.dart';
 import 'package:sharezone/settings/src/subpages/imprint/page/imprint_page.dart';
 import 'package:sharezone/settings/src/subpages/theme/theme_page.dart';
+import 'package:sharezone/sharezone_v2/sz_v2_announcement_dialog.dart';
 import 'package:sharezone/support/support_page.dart';
 import 'package:sharezone/settings/src/subpages/timetable/timetable_settings_page.dart';
 import 'package:sharezone/settings/src/subpages/web_app.dart';
@@ -149,10 +150,12 @@ class _SharezoneAppState extends State<SharezoneApp>
               blocDependencies: widget.blocDependencies,
               home: MissingAccountInformationGuard(
                 userCollection: widget.blocDependencies.references.users,
-                child: OnboardingListener(
-                  child: NavigationController(
-                    fbMessagingConfigurator: fbMessagingConfigurator,
-                    key: navigationBloc.controllerKey,
+                child: SharezoneV2AnnoucementDialogGuard(
+                  child: OnboardingListener(
+                    child: NavigationController(
+                      fbMessagingConfigurator: fbMessagingConfigurator,
+                      key: navigationBloc.controllerKey,
+                    ),
                   ),
                 ),
               ),