LibWeb: Implement HTML::ImageBitmap creation from HTML::ImageData

Author: https://github.com/ayeteadoe
Commit: 81ccb655b4
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4801
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/gmta

Libraries/LibWeb/HTML/EventLoop/Task.h

@@ -38,6 +38,9 @@ public:
         // https://w3c.github.io/geolocation/#dfn-geolocation-task-source
         Geolocation,
 
+        // https://html.spec.whatwg.org/multipage/imagebitmap-and-animations.html#bitmap-task-source
+        BitmapTask,
+
         // https://html.spec.whatwg.org/multipage/webappapis.html#navigation-and-traversal-task-source
         NavigationAndTraversal,