Support codeberg as source

[txtsd]

Please add support to check tags on codeberg.org

[lilydjwg]

Does the "git" source work for you?

[txtsd]

In the interim it does, but I'll try and open a PR for this myself soon.

[fossdd]

This is mostly covered by the gitea source (with host=codeberg.org). I was thinking of creating a forgejo/codeberg source, but thats mostly a copy of gitea...