Indicate support status of version groups/branches in the api

[MiniDigger]

hosts need to deploy new servers, we need to somehow indicate to them which version is safe to use and which version needs extra caution and which versions should be avoided.

maybe we can just add a field to version groups "supportStatus" with values like unsupported, maintenance only, current supported, experimental?

we could even use this ourself and fill our download page tabs automatically instead of doing it manually