TF-4178 Add datasource/repository/interactor for create new label

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

@@ -3,4 +3,6 @@ import 'package:labels/model/label.dart';
 
 abstract class LabelRepository {
   Future<List<Label>> getAllLabels(AccountId accountId);
+
+  Future<Label> createNewLabel(AccountId accountId, Label labelData);
 }

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

@@ -0,0 +1,18 @@
+import 'package:core/presentation/state/failure.dart';
+import 'package:core/presentation/state/success.dart';
+import 'package:labels/model/label.dart';
+
+class CreatingNewLabel extends LoadingState {}
+
+class CreateNewLabelSuccess extends UIState {
+  final Label newLabel;
+
+  CreateNewLabelSuccess(this.newLabel);
+
+  @override
+  List<Object> get props => [newLabel];
+}
+
+class CreateNewLabelFailure extends FeatureFailure {
+  CreateNewLabelFailure(dynamic exception) : super(exception: exception);
+}

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

@@ -0,0 +1,29 @@
+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/model/label.dart';
+import 'package:tmail_ui_user/features/labels/domain/repository/label_repository.dart';
+import 'package:tmail_ui_user/features/labels/domain/state/create_new_label_state.dart';
+
+class CreateNewLabelInteractor {
+  final LabelRepository _labelRepository;
+
+  CreateNewLabelInteractor(this._labelRepository);
+
+  Stream<Either<Failure, Success>> execute(
+    AccountId accountId,
+    Label labelData,
+  ) async* {
+    try {
+      yield Right(CreatingNewLabel());
+      final newLabel = await _labelRepository.createNewLabel(
+        accountId,
+        labelData,
+      );
+      yield Right(CreateNewLabelSuccess(newLabel));
+    } catch (e) {
+      yield Left(CreateNewLabelFailure(e));
+    }
+  }
+}