IGraphicScene添加订阅方法

src/jlgraphic/app/JlGraphicApp.ts

@@ -523,6 +523,14 @@ export interface IGraphicScene extends EventEmitter<GraphicAppEvents> {
    * 销毁
    */
   destroy(): void;
+  /**
+   * 订阅websocket消息
+   */
+  subscribe(sub: AppStateSubscription): void;
+  /**
+   * 取消websocket订阅
+   */
+  unsubscribe(destination: string): void;
 }
 
 abstract class GraphicSceneBase