add delete_email_rule feature

lib/features/manage_account/domain/state/delete_email_rule_state.dart

@@ -0,0 +1,20 @@
+import 'package:core/core.dart';
+import 'package:rule_filter/rule_filter/tmail_rule.dart';
+
+class DeleteEmailRuleSuccess extends UIState {
+  final List<TMailRule>? rules;
+
+  DeleteEmailRuleSuccess(this.rules);
+
+  @override
+  List<Object?> get props => [rules];
+}
+
+class DeleteEmailRuleFailure extends FeatureFailure {
+  final dynamic exception;
+
+  DeleteEmailRuleFailure(this.exception);
+
+  @override
+  List<Object> get props => [exception];
+}