feat: add jsb.to_array_buffer utility function

Author: ialex32x

typescripts/typings/godot.minimal.d.ts

@@ -1,6 +1,6 @@
 
 declare namespace jsb {
-    import { Callable as GDCallable, Object as GDObject, PropertyUsageFlags, PropertyHint, MethodFlags, Variant } from "godot";
+    import { Callable as GDCallable, Object as GDObject, PackedByteArray, PropertyUsageFlags, PropertyHint, MethodFlags, Variant } from "godot";
 
     const DEV_ENABLED: boolean;
     const TOOLS_ENABLED: boolean;
@@ -20,6 +20,8 @@ declare namespace jsb {
      */
     function is_instance_valid(self: GDObject): boolean;
 
+    function to_array_buffer(packed: PackedByteArray): ArrayBuffer;
+
     interface ScriptPropertyInfo {
         name: string;
         type: Variant.Type;