Remove notification service and update project

- Remove flutter_local_notifications dependency from pubspec.yaml
- Delete notification_service.dart file
- Remove notification service references from app_service.dart and app_binding.dart
- Clean up related code and dependencies

analysis_options.yaml

@@ -9,6 +9,10 @@
 # packages, and plugins designed to encourage good coding practices.
 include: package:flutter_lints/flutter.yaml
 
+analyzer:
+  exclude:
+    - packages/**
+
 linter:
   # The lint rules applied to this project can be customized in the
   # section below to disable rules from the `package:flutter_lints/flutter.yaml`