title: How to add Hierarchical Tags in Redoc
body: <p>Currently Redoc only supports 2 depths of menu on the left hand panel. Is there any way, we can add one more depth? Someone has already created issue for this - <a href="https://github.com/Redocly/redoc/issues/1489" rel="nofollow noreferrer">https://github.com/Redocly/redoc/issues/1489</a></p>