Add API support for passing a C++ function as a microtask callback

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 7af4322b08a7ded0a760bbb3aeb2ab96420a5231..12166ad756f4cddb0c4dca56858b279f31b3bdfc 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -3970,6 +3970,9 @@ typedef void (*MemoryAllocationCallback)(ObjectSpace space,
 // --- Leave Script Callback ---
 typedef void (*CallCompletedCallback)();
 
+// --- Microtask Callback ---
+typedef void (*MicrotaskCallback)(void* data);
+
 // --- Failed Access Check Callback ---
 typedef void (*FailedAccessCheckCallback)(Local<Object> target,
                                           AccessType type,
@@ -4389,6 +4392,11 @@ class V8_EXPORT Isolate {
    */
   void EnqueueMicrotask(Handle<Function> microtask);
 
+  /**
+   * Experimental: Enqueues the callback to the Microtask Work Queue
+   */
+  void EnqueueMicrotask(MicrotaskCallback microtask, void* data = NULL);
+
    /**
    * Experimental: Controls whether the Microtask Work Queue is automatically
    * run when the script call depth decrements to zero.