fix(sample-app): make possible to run app

lib/utils/create-listener-decorator.util.ts

@@ -0,0 +1,18 @@
+import { SetMetadata } from '@nestjs/common';
+import { BaseScene as Scene } from 'telegraf';
+import { ComposerMethodArgs, SceneMethods } from '../types';
+import { UPDATE_LISTENER_METADATA } from '../telegraf.constants';
+import { ListenerMetadata } from '../interfaces';
+
+export function createListenerDecorator<Method extends SceneMethods>(
+  method: Method,
+) {
+  return (
+    ...args: ComposerMethodArgs<Scene<never>, Method>
+  ): MethodDecorator => {
+    return SetMetadata(UPDATE_LISTENER_METADATA, {
+      method,
+      args,
+    } as ListenerMetadata);
+  };
+}