TF-537 Add domain layer for delete a identity

lib/features/manage_account/domain/repository/manage_account_repository.dart

@@ -1,6 +1,9 @@
 import 'package:jmap_dart_client/jmap/account_id.dart';
+import 'package:jmap_dart_client/jmap/identities/identity.dart';
 import 'package:tmail_ui_user/features/manage_account/domain/model/identities_response.dart';
 
 abstract class ManageAccountRepository {
   Future<IdentitiesResponse> getAllIdentities(AccountId accountId);
+
+  Future<bool> deleteIdentity(AccountId accountId, IdentityId identityId);
 }

lib/features/manage_account/domain/state/delete_identity_state.dart

@@ -0,0 +1,18 @@
+import 'package:core/core.dart';
+
+class DeleteIdentitySuccess extends UIState {
+
+  DeleteIdentitySuccess();
+
+  @override
+  List<Object?> get props => [];
+}
+
+class DeleteIdentityFailure extends FeatureFailure {
+  final dynamic exception;
+
+  DeleteIdentityFailure(this.exception);
+
+  @override
+  List<Object> get props => [exception];
+}

lib/features/manage_account/domain/usecases/delete_identity_interactor.dart

@@ -0,0 +1,23 @@
+import 'dart:core';
+
+import 'package:core/core.dart';
+import 'package:dartz/dartz.dart';
+import 'package:jmap_dart_client/jmap/account_id.dart';
+import 'package:jmap_dart_client/jmap/identities/identity.dart';
+import 'package:tmail_ui_user/features/manage_account/domain/repository/manage_account_repository.dart';
+import 'package:tmail_ui_user/features/manage_account/domain/state/delete_identity_state.dart';
+
+class DeleteIdentityInteractor {
+  final ManageAccountRepository manageAccountRepository;
+
+  DeleteIdentityInteractor(this.manageAccountRepository);
+
+  Stream<Either<Failure, Success>> execute(AccountId accountId, IdentityId identityId) async* {
+    try {
+      final result = await manageAccountRepository.deleteIdentity(accountId, identityId);
+      yield result ? Right(DeleteIdentitySuccess()) : Left(DeleteIdentityFailure(null));
+    } catch (exception) {
+      yield Left(DeleteIdentityFailure(exception));
+    }
+  }
+}