QmlDesigner: Implement Quick3DNodeInstance wrapper

We use Quick3DNodeInstance as a proxy class to wrap QQuick3DNode.
The access to private API like QQuick3DNodePrivate::setIsHiddenInEditor()
is restriced by such proxy classes.

Change-Id: If5191c3b730359000cf983c3af206dcffa07be74
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>
Reviewed-by: Mahmoud Badri <mahmoud.badri@qt.io>
Reviewed-by: Pasi Keränen <pasi.keranen@qt.io>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

share/qtcreator/qml/qmlpuppet/qml2puppet/instances/objectnodeinstance.h

@@ -193,6 +193,8 @@ public:
 
     virtual PropertyNameList ignoredProperties() const;
 
+    void virtual setHideInEditor(bool b);
+
 protected:
     explicit ObjectNodeInstance(QObject *object);
     void doResetProperty(const PropertyName &propertyName);