feat: Implement account management features

- Added ExpenseDetailDialog for displaying expense details and actions.
- Created ExpensesTab to list expenses for a group.
- Developed GroupExpensesPage to manage group expenses with tabs for expenses, balances, and settlements.
- Introduced SettlementsTab to show optimized repayment plans.
- Refactored create_trip_content.dart to remove CountBloc and related logic.
- Added Account model to manage user accounts and group members.
- Replaced CountRepository with AccountRepository for account-related operations.
- Removed CountService and CountRepository as part of the refactor.
- Updated main.dart and home.dart to integrate new account management components.

lib/main.dart

@@ -12,13 +12,13 @@ import 'blocs/theme/theme_state.dart';
 import 'blocs/group/group_bloc.dart';
 import 'blocs/user/user_bloc.dart';
 import 'blocs/trip/trip_bloc.dart';
-import 'blocs/count/count_bloc.dart';
+import 'blocs/account/account_bloc.dart';
 import 'repositories/auth_repository.dart';
 import 'repositories/trip_repository.dart';
 import 'repositories/user_repository.dart';
 import 'repositories/group_repository.dart';
 import 'repositories/message_repository.dart';
-import 'repositories/count_repository.dart';
+import 'repositories/account_repository.dart';
 import 'pages/login.dart';
 import 'pages/home.dart';
 import 'pages/signup.dart';
@@ -54,9 +54,7 @@ class MyApp extends StatelessWidget {
         RepositoryProvider<MessageRepository>(
           create: (context) => MessageRepository(),
         ),
-        RepositoryProvider<CountRepository>(
-          create: (context) => CountRepository(),
-        ),
+        
       ],
       child: MultiBlocProvider(
         providers: [
@@ -79,9 +77,7 @@ class MyApp extends StatelessWidget {
           BlocProvider(
             create: (context) => MessageBloc(),
             ),
-          BlocProvider(
-            create: (context) => CountBloc(),
-          ),
+          
         ],
         child: BlocBuilder<ThemeBloc, ThemeState>(
           builder: (context, themeState) {