Refactor signup page to use BLoC pattern and implement authentication repository

- Updated signup.dart to replace Provider with BLoC for state management.
- Created AuthRepository to handle authentication logic and Firestore user management.
- Added TripRepository and UserRepository for trip and user data management.
- Implemented methods for user sign-in, sign-up, and data retrieval in repositories.
- Enhanced trip management with create, update, delete, and participant management functionalities.
- Updated AuthService to include new methods for sign-in and sign-up.
- Removed unnecessary print statements from TripService for cleaner code.
- Added dependencies for flutter_bloc and equatable in pubspec.yaml.

Not tested yet

lib/main.dart

@@ -1,30 +1,25 @@
 import 'package:flutter/material.dart';
-import 'package:provider/provider.dart';
-import 'package:travel_mate/pages/resetpswd.dart';
-import 'package:travel_mate/pages/signup.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:firebase_core/firebase_core.dart';
+import 'blocs/auth/auth_bloc.dart';
+import 'blocs/auth/auth_event.dart';
+import 'blocs/auth/auth_state.dart';
+import 'blocs/theme/theme_bloc.dart';
+import 'blocs/theme/theme_event.dart';
+import 'blocs/theme/theme_state.dart';
+import 'repositories/auth_repository.dart';
+import 'repositories/trip_repository.dart';
+import 'repositories/user_repository.dart';
 import 'pages/login.dart';
 import 'pages/home.dart';
-import 'providers/theme_provider.dart';
-import 'providers/user_provider.dart';
-import 'package:firebase_core/firebase_core.dart';
-import 'firebase_options.dart';
+import 'pages/signup.dart';
+import 'pages/resetpswd.dart';
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
-  await Firebase.initializeApp(
-  options: DefaultFirebaseOptions.currentPlatform,
-);
-  runApp(
-    MultiProvider(
-      providers: [
-        ChangeNotifierProvider(create: (context) => ThemeProvider()),
-        ChangeNotifierProvider(
-          create: (context) => UserProvider(),
-        ), // Ajoutez cette ligne
-      ],
-      child: const MyApp(),
-    ),
-  );
+  await Firebase.initializeApp();
+
+  runApp(const MyApp());
 }
 
 class MyApp extends StatelessWidget {
@@ -32,40 +27,67 @@ class MyApp extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return Consumer<ThemeProvider>(
-      builder: (context, themeProvider, child) {
-        return MaterialApp(
-          title: 'Travel Mate',
-          themeMode: themeProvider.themeMode,
-
-          // Thème clair
-          theme: ThemeData(
-            colorScheme: ColorScheme.fromSeed(
-              seedColor: const Color.fromARGB(255, 180, 180, 180),
-              brightness: Brightness.light,
-            ),
-            useMaterial3: true,
+    return MultiRepositoryProvider(
+      providers: [
+        RepositoryProvider<AuthRepository>(
+          create: (context) => AuthRepository(),
+        ),
+        RepositoryProvider<UserRepository>(
+          create: (context) => UserRepository(),
+        ),
+        RepositoryProvider<TripRepository>(
+          create: (context) => TripRepository(),
+        ),
+      ],
+      child: MultiBlocProvider(
+        providers: [
+          BlocProvider<ThemeBloc>(
+            create: (context) => ThemeBloc()..add(ThemeLoadRequested()),
           ),
-
-          // Thème sombre
-          darkTheme: ThemeData(
-            colorScheme: ColorScheme.fromSeed(
-              seedColor: const Color.fromARGB(255, 43, 43, 43),
-              brightness: Brightness.dark,
-            ),
-            useMaterial3: true,
+          BlocProvider<AuthBloc>(
+            create: (context) => AuthBloc(
+              authRepository: context.read<AuthRepository>(),
+            )..add(AuthCheckRequested()),
           ),
-
-          initialRoute: '/login',
-          routes: {
-            '/login': (context) => const LoginPage(),
-            '/signup': (context) => const SignUpPage(),
-            '/home': (context) => const HomePage(),
-            '/forgot': (context) => const ForgotPasswordPage(),
+        ],
+        child: BlocBuilder<ThemeBloc, ThemeState>(
+          builder: (context, themeState) {
+            return MaterialApp(
+              title: 'Travel Mate',
+              themeMode: themeState.themeMode,
+              theme: ThemeData(
+                colorScheme: ColorScheme.fromSeed(
+                  seedColor: const Color.fromARGB(255, 180, 180, 180),
+                  brightness: Brightness.light,
+                ),
+                useMaterial3: true,
+              ),
+              darkTheme: ThemeData(
+                colorScheme: ColorScheme.fromSeed(
+                  seedColor: const Color.fromARGB(255, 43, 43, 43),
+                  brightness: Brightness.dark,
+                ),
+                useMaterial3: true,
+              ),
+              home: BlocBuilder<AuthBloc, AuthState>(
+                builder: (context, authState) {
+                  if (authState is AuthAuthenticated) {
+                    return const HomePage();
+                  }
+                  return const LoginPage();
+                },
+              ),
+              routes: {
+                '/login': (context) => const LoginPage(),
+                '/signup': (context) => const SignUpPage(),
+                '/home': (context) => const HomePage(),
+                '/forgot': (context) => const ForgotPasswordPage(),
+              },
+              debugShowCheckedModeBanner: false,
+            );
           },
-          debugShowCheckedModeBanner: false,
-        );
-      },
+        ),
+      ),
     );
   }
 }