TF-78 Implement automatically marked as read when open one email

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

@@ -0,0 +1,18 @@
+import 'package:core/core.dart';
+
+class MarkAsEmailReadSuccess extends UIState {
+
+  MarkAsEmailReadSuccess();
+
+  @override
+  List<Object?> get props => [];
+}
+
+class MarkAsEmailReadFailure extends FeatureFailure {
+  final exception;
+
+  MarkAsEmailReadFailure(this.exception);
+
+  @override
+  List<Object> get props => [exception];
+}