TF-3515 Add save email as template feature

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

@@ -0,0 +1,18 @@
+import 'package:core/presentation/state/failure.dart';
+import 'package:core/presentation/state/success.dart';
+import 'package:jmap_dart_client/jmap/mail/email/email.dart';
+
+class SavingTemplateEmail extends LoadingState {}
+
+class SaveTemplateEmailSuccess extends UIState {
+  SaveTemplateEmailSuccess(this.emailId);
+
+  final EmailId emailId;
+
+  @override
+  List<Object> get props => [emailId];
+}
+
+class SaveTemplateEmailFailure extends FeatureFailure {
+  SaveTemplateEmailFailure({super.exception});
+}

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

@@ -0,0 +1,18 @@
+import 'package:core/presentation/state/failure.dart';
+import 'package:core/presentation/state/success.dart';
+import 'package:jmap_dart_client/jmap/mail/email/email.dart';
+
+class UpdatingTemplateEmail extends LoadingState {}
+
+class UpdateTemplateEmailSuccess extends UIState {
+  UpdateTemplateEmailSuccess(this.emailId);
+
+  final EmailId emailId;
+
+  @override
+  List<Object> get props => [emailId];
+}
+
+class UpdateTemplateEmailFailure extends FeatureFailure {
+  UpdateTemplateEmailFailure({super.exception});
+}