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/services/trip_service.dart

@@ -1,5 +1,5 @@
 import 'package:cloud_firestore/cloud_firestore.dart';
-import '../models/trip.dart';
+import '../data/models/trip.dart';
 
 class TripService {
   final FirebaseFirestore _firestore = FirebaseFirestore.instance;
@@ -53,26 +53,19 @@ class TripService {
         .collection(_tripsCollection)
         .snapshots()
         .map((snapshot) {
-      print('=== NOUVEAU SNAPSHOT ===');
-      print('Nombre de documents: ${snapshot.docs.length}');
       
       final List<Trip> trips = [];
       
       for (int i = 0; i < snapshot.docs.length; i++) {
         var doc = snapshot.docs[i];
-        print('\n--- Document $i (${doc.id}) ---');
         
         try {
-          final data = doc.data() as Map<String, dynamic>;
+          final data = doc.data();
           
           // Vérifier si l'utilisateur est impliqué dans ce voyage
           final String createdBy = data['createdBy']?.toString() ?? '';
           final List<dynamic> participants = data['participants'] ?? [];
           
-          print('CreatedBy: "$createdBy"');
-          print('UserId: "$userId"');
-          print('Participants: $participants');
-          
           bool userIsInvolved = false;
           String reason = '';
           
@@ -88,20 +81,11 @@ class TripService {
             reason = reason.isEmpty ? 'Participant par ID' : '$reason + Participant par ID';
           }
           
-          print('Utilisateur impliqué: $userIsInvolved');
-          print('Raison: $reason');
-          
           if (userIsInvolved) {
-            print('Tentative de conversion du trip...');
             final trip = _convertDocumentToTrip(doc.id, data);
             if (trip != null) {
               trips.add(trip);
-              print('Trip ajouté: ${trip.title}');
-            } else {
-              print('Échec de la conversion du trip');
             }
-          } else {
-            print('Utilisateur non impliqué dans ce voyage');
           }
         } catch (e, stackTrace) {
           print('Erreur lors du traitement du document ${doc.id}: $e');
@@ -109,14 +93,6 @@ class TripService {
         }
       }
       
-      print('\n=== RÉSUMÉ ===');
-      print('Trips trouvés: ${trips.length}');
-      if (trips.isNotEmpty) {
-        for (int i = 0; i < trips.length; i++) {
-          print('  ${i+1}. ${trips[i].title} (${trips[i].id})');
-        }
-      }
-      
       // Trier par date de création (les plus récents en premier)
       trips.sort((a, b) {
         try {
@@ -138,8 +114,6 @@ class TripService {
   // Obtenir les voyages d'un utilisateur (version simplifiée)
   Future<List<Trip>> getTripsByUser(String userId) async {
     try {
-      print('Récupération des voyages pour userId: $userId');
-      
       // Récupérer d'abord les voyages créés par l'utilisateur
       final QuerySnapshot createdTrips = await _firestore
           .collection(_tripsCollection)
@@ -176,9 +150,7 @@ class TripService {
   }
 
   // Méthode helper pour convertir un document Firestore en Trip
-  Trip? _convertDocumentToTrip(String docId, Map<String, dynamic> data) {
-    print('\n=== CONVERSION TRIP $docId ===');
-    
+  Trip? _convertDocumentToTrip(String docId, Map<String, dynamic> data) {    
     try {
       // Créer une copie des données pour ne pas modifier l'original
       Map<String, dynamic> processedData = Map<String, dynamic>.from(data);
@@ -211,7 +183,7 @@ class TripService {
       return trip;
       
     } catch (e, stackTrace) {
-      print('❌ Erreur lors de la conversion du document $docId: $e');
+      print('Erreur lors de la conversion du document $docId: $e');
       print('StackTrace: $stackTrace');
       return null;
     }