feat: Implement account management functionality with loading, creation, and error handling

lib/blocs/account/account_state.dart

@@ -0,0 +1,40 @@
+import 'package:equatable/equatable.dart';
+import '../../data/models/account.dart';
+
+abstract class AccountState extends Equatable {
+  const AccountState();
+
+  @override
+  List<Object?> get props => [];
+}
+
+class AccountInitial extends AccountState {}
+
+class AccountLoading extends AccountState {}
+
+class AccountsLoaded extends AccountState {
+  final List<Account> accounts;
+
+  const AccountsLoaded(this.accounts);
+
+  @override
+  List<Object?> get props => [accounts];
+}
+
+class AccountOperationSuccess extends AccountState {
+  final String message;
+
+  const AccountOperationSuccess(this.message);
+
+  @override
+  List<Object?> get props => [message];
+}
+
+class AccountError extends AccountState {
+  final String message;
+
+  const AccountError(this.message);
+
+  @override
+  List<Object?> get props => [message];
+}