Documentation should have a version selector

[sylock]

Summary

There are more and more differences of behavior and options between the versions of argo. Like a lot of other projects, it would be of great help if the documentation would have a list selector with the available versions of argo. And thus loading the documentation related to the chosen version (for example, selecting v3.0.0 would show me the doc about the key-only artifact, but selecting the v2.12.7 would not).
I'm talking about the documentation here: https://argoproj.github.io/argo-workflows

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[sujaykulkarn]

Hi @alexec, @sylock I am interested to contribute to this issue, I want to know the approach to support this enhancement. Thanks

[abrennan89]

I think ya'll are using Mkdocs, which has a feature for this already: https://squidfunk.github.io/mkdocs-material/setup/setting-up-versioning/

[agilgur5]

This has been completed as part of #11390. Marking this as duplicate since that issue has a ton more details