Setup /RKJSModules/Marketplace directory structure + extracting MarketplaceRelayQueryConstants and dependencies

Reviewed By: fkgozali

Differential Revision: D9110647

fbshipit-source-id: e04d523a2dc26f923f083533b9aeabc12d18f23d

Author: oleolek

Libraries/vendor/core/guid.js.flow

@@ -0,0 +1,12 @@
+/**
+ * Copyright 2004-present Facebook. All Rights Reserved.
+ *
+ * @flow strict
+ * @format
+ */
+
+'use strict';
+
+declare function guid(): string;
+
+module.exports = guid;