TF-4171 Add datasource/repository/interactor for get all labels

lib/features/labels/domain/state/get_all_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 GettingAllLabel extends LoadingState {}
+
+class GetAllLabelSuccess extends UIState {
+  final List<Label> labels;
+
+  GetAllLabelSuccess(this.labels);
+
+  @override
+  List<Object> get props => [labels];
+}
+
+class GetAllLabelFailure extends FeatureFailure {
+  GetAllLabelFailure(dynamic exception) : super(exception: exception);
+}