Issue #3316721: Add script to convert this module into a core merge request

scripts/src/Converter.php

@@ -7,6 +7,14 @@ use Symfony\Component\Filesystem\Filesystem;
 
 /**
  * Converts the contrib module to core merge request.
+ *
+ * File usage:
+ *
+ * @code
+ * composer core-covert /path/to/core merge-request-branch
+ * @endcode
+ *
+ * The core clone should already have the core merge request locally.
  */
 class Converter {