Unmounts the widget and cleans up resources

Description

This method unmounts the widget by calling the parent class unmount method and cleaning up any associated objects. It also disconnects any observers and removes event handlers. let widget = new w2[widgetType]({ name: 'myWidget', // ... other options }); // Later, when you want to clean up widget.unmount(); This method is typically called automatically when the widget is destroyed or when re-rendering into a new container.