Destroys the widget and removes it from the global w2ui object

Description

This method completely destroys the widget by cleaning up all associated objects, unmounting the widget, removing it from the global w2ui object, and cleaning up event handlers. It triggers the 'destroy' event before and after destruction. let widget = new w2[widgetType]({ name: 'myWidget', // ... other options }); // Later, when you want to completely destroy the widget widget.destroy(); // widget is now removed from w2ui object and all resources are cleaned up The method returns true if the widget was successfully destroyed, false if the widget was not found in the global w2ui object.