feat: introduce feature flag for new flow editor

packages/web/src/components/EditorNew/EditorNew.js

@@ -0,0 +1,12 @@
+import * as React from 'react';
+import { FlowPropType } from 'propTypes/propTypes';
+
+function EditorNew(props) {
+  return <div>new editor comes here</div>;
+}
+
+EditorNew.propTypes = {
+  flow: FlowPropType.isRequired,
+};
+
+export default EditorNew;