Created by: andresgalante
This PR closes #23831 (closed) it adds a <nav> tag around Navs snippets.
@patrickhlauke I am in the fence with this one, I thought it was a great idea but now that I think about it, users might end up adding navs everywhere on their document even though their navs are not used as navigation. On the other hands chances are that navs are mostly use for navigation. If you think the accessibility notes are enough, please close this PR, and as always thanks a lot for the review, I learn a lot from them