add eol and versioning page

[evenstensberg]

[avivkeller]

@evenstensberg We don't have a versioning schedule, right?

What would this page even say, can we elaborate?

[bjohansebas]

I suggest keeping it simple, like we do in Express: https://expressjs.com/en/support/. I don't think we need something as long as Node.js has

[avivkeller]

Self-assigning as this is marketing related and should be done by a maintainer