Merge pull request #104844 from Ivorforce/gdsoftclass

Add and require `GDSOFTCLASS` for `Object` subclasses that want to cast but do not use `GDCLASS`.

tests/core/object/test_method_bind.h

@@ -55,6 +55,8 @@ public:
 	};
 
 	class ObjectSubclass : public Object {
+		GDSOFTCLASS(ObjectSubclass, Object);
+
 	public:
 		int value = 1;
 	};