TF-1289: [Domain] Add DestroySubscription in use-case

lib/features/push_notification/domain/state/destroy_subscription_state.dart

@@ -0,0 +1,24 @@
+import 'package:core/presentation/state/failure.dart';
+import 'package:core/presentation/state/success.dart';
+
+
+class DestroySubscriptionLoading extends UIState {}
+
+class DestroySubscriptionSuccess extends UIState {
+
+  final bool destroyedSubscription;
+
+  DestroySubscriptionSuccess(this.destroyedSubscription);
+
+  @override
+  List<Object> get props => [destroyedSubscription];
+}
+
+class DestroySubscriptionFailure extends FeatureFailure {
+  final dynamic exception;
+
+  DestroySubscriptionFailure(this.exception);
+
+  @override
+  List<Object> get props => [exception];
+}