fix macro not running without explicit import

standalone-openfl-app/src/macros/AssetMacro.hx

@@ -15,6 +15,11 @@ using StringTools;
 class AssetMacro {
     // Track all assets processed
     private static var assetMap:Map<String, Array<{id:String, path:String, size:Int, type:String}>> = new Map();
+
+    /** Force Assets to be typed, which invokes its @:build macro. */
+    public static function includeAssets():Void {
+        Context.getType("Assets");
+    }
     
     /**
      * Entry point for the macro - called during compilation