TF-2901 Implement caching composer on log out

lib/features/composer/domain/state/restore_email_inline_images_state.dart

@@ -0,0 +1,18 @@
+import 'package:core/presentation/state/failure.dart';
+import 'package:core/presentation/state/success.dart';
+
+class RestoringEmailInlineImages extends LoadingState {}
+
+class RestoreEmailInlineImagesSuccess extends UIState {
+  final String emailContent;
+
+  RestoreEmailInlineImagesSuccess(this.emailContent);
+
+  @override
+  List<Object?> get props => [emailContent];
+}
+
+class RestoreEmailInlineImagesFailure extends FeatureFailure {
+
+  RestoreEmailInlineImagesFailure({super.exception});
+}