Refactor user and theme management to use BLoC pattern; remove provider classes and integrate new services for user and group functionalities

lib/blocs/group/group_event.dart

@@ -0,0 +1,71 @@
+import 'package:equatable/equatable.dart';
+import '../../data/models/group.dart';
+
+abstract class GroupEvent extends Equatable {
+  const GroupEvent();
+
+  @override
+  List<Object?> get props => [];
+}
+
+class GroupLoadRequested extends GroupEvent {
+  final String userId;
+
+  const GroupLoadRequested({required this.userId});
+
+  @override
+  List<Object?> get props => [userId];
+}
+
+class GroupCreateRequested extends GroupEvent {
+  final Group group;
+
+  const GroupCreateRequested({required this.group});
+
+  @override
+  List<Object?> get props => [group];
+}
+
+class GroupUpdateRequested extends GroupEvent {
+  final Group group;
+
+  const GroupUpdateRequested({required this.group});
+
+  @override
+  List<Object?> get props => [group];
+}
+
+class GroupDeleteRequested extends GroupEvent {
+  final String groupId;
+
+  const GroupDeleteRequested({required this.groupId});
+
+  @override
+  List<Object?> get props => [groupId];
+}
+
+class GroupMemberAddRequested extends GroupEvent {
+  final String groupId;
+  final String memberId;
+
+  const GroupMemberAddRequested({
+    required this.groupId,
+    required this.memberId,
+  });
+
+  @override
+  List<Object?> get props => [groupId, memberId];
+}
+
+class GroupMemberRemoveRequested extends GroupEvent {
+  final String groupId;
+  final String memberId;
+
+  const GroupMemberRemoveRequested({
+    required this.groupId,
+    required this.memberId,
+  });
+
+  @override
+  List<Object?> get props => [groupId, memberId];
+}