TF-3082 Warn user and save identity cache on reload/session expired

lib/features/identity_creator/domain/state/save_identity_cache_on_web_state.dart

@@ -0,0 +1,10 @@
+import 'package:core/presentation/state/failure.dart';
+import 'package:core/presentation/state/success.dart';
+
+class SavingIdentityCacheOnWeb extends LoadingState {}
+
+class SaveIdentityCacheOnWebSuccess extends UIState {}
+
+class SaveIdentityCacheOnWebFailure extends FeatureFailure {
+  SaveIdentityCacheOnWebFailure({super.exception});
+}