TF-79 Mark as star/unstar in email detailed view

lib/features/email/domain/state/mark_as_email_important_state.dart

@@ -0,0 +1,23 @@
+import 'package:core/core.dart';
+import 'package:jmap_dart_client/jmap/mail/email/email.dart';
+import 'package:model/model.dart';
+
+class MarkAsEmailImportantSuccess extends UIState {
+  final EmailId emailId;
+  final ImportantAction importantAction;
+
+  MarkAsEmailImportantSuccess(this.emailId, this.importantAction);
+
+  @override
+  List<Object?> get props => [emailId, importantAction];
+}
+
+class MarkAsEmailImportantFailure extends FeatureFailure {
+  final exception;
+  final ImportantAction importantAction;
+
+  MarkAsEmailImportantFailure(this.exception, this.importantAction);
+
+  @override
+  List<Object> get props => [exception, importantAction];
+}