TF-4243 Add datasource/repository/interactor for delete a label feature

lib/features/labels/domain/repository/label_repository.dart

@@ -8,4 +8,6 @@ abstract class LabelRepository {
   Future<Label> createNewLabel(AccountId accountId, Label labelData);
 
   Future<Label> editLabel(AccountId accountId, EditLabelRequest labelRequest);
+
+  Future<void> deleteLabel(AccountId accountId, Label label);
 }

lib/features/labels/domain/state/delete_a_label_state.dart

@@ -0,0 +1,17 @@
+import 'package:core/presentation/state/failure.dart';
+import 'package:core/presentation/state/success.dart';
+
+class DeletingALabel extends LoadingState {}
+
+class DeleteALabelSuccess extends UIState {
+  final String labelDisplayName;
+
+  DeleteALabelSuccess(this.labelDisplayName);
+
+  @override
+  List<Object> get props => [labelDisplayName];
+}
+
+class DeleteALabelFailure extends FeatureFailure {
+  DeleteALabelFailure(dynamic exception) : super(exception: exception);
+}

lib/features/labels/domain/usecases/delete_a_label_interactor.dart

@@ -0,0 +1,27 @@
+import 'package:core/presentation/state/failure.dart';
+import 'package:core/presentation/state/success.dart';
+import 'package:dartz/dartz.dart';
+import 'package:jmap_dart_client/jmap/account_id.dart';
+import 'package:labels/extensions/label_extension.dart';
+import 'package:labels/model/label.dart';
+import 'package:tmail_ui_user/features/labels/domain/repository/label_repository.dart';
+import 'package:tmail_ui_user/features/labels/domain/state/delete_a_label_state.dart';
+
+class DeleteALabelInteractor {
+  final LabelRepository _labelRepository;
+
+  DeleteALabelInteractor(this._labelRepository);
+
+  Stream<Either<Failure, Success>> execute(
+    AccountId accountId,
+    Label label,
+  ) async* {
+    try {
+      yield Right(DeletingALabel());
+      await _labelRepository.createNewLabel(accountId, label);
+      yield Right(DeleteALabelSuccess(label.safeDisplayName));
+    } catch (e) {
+      yield Left(DeleteALabelFailure(e));
+    }
+  }
+}