TF-138 Add domain layer for search mail with text pattern

lib/features/thread/domain/state/search_email_state.dart

@@ -0,0 +1,39 @@
+
+import 'package:core/core.dart';
+import 'package:model/email/presentation_email.dart';
+import 'package:tmail_ui_user/features/thread/domain/model/search_query.dart';
+
+class SearchingState extends UIState {
+
+  SearchingState();
+
+  @override
+  List<Object> get props => [];
+}
+
+class SearchEmailNewQuery extends UIState {
+  final SearchQuery searchQuery;
+
+  SearchEmailNewQuery(this.searchQuery);
+
+  @override
+  List<Object> get props => [searchQuery];
+}
+
+class SearchEmailSuccess extends UIState {
+  final List<PresentationEmail> emailList;
+
+  SearchEmailSuccess(this.emailList);
+
+  @override
+  List<Object> get props => [emailList];
+}
+
+class SearchEmailFailure extends FeatureFailure {
+  final exception;
+
+  SearchEmailFailure(this.exception);
+
+  @override
+  List<Object> get props => [exception];
+}