LibWeb: Add an 'enqueue' helper method on TransformStream

Author: https://github.com/shannonbooth
Commit: 5f2b75852f
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/3029
Reviewed-by: https://github.com/kennethmyhra ✅

Libraries/LibWeb/Streams/TransformStream.h

@@ -42,6 +42,7 @@ public:
     void set_controller(GC::Ptr<TransformStreamDefaultController> value) { m_controller = value; }
 
     void set_up(GC::Ref<TransformAlgorithm>, GC::Ptr<FlushAlgorithm> = {}, GC::Ptr<CancelAlgorithm> = {});
+    void enqueue(JS::Value chunk);
 
 private:
     explicit TransformStream(JS::Realm& realm);