Add Forgejo as a Git provider

[MarioGK]

It would be awesome to have Forgejo as a git provider, even though there is this big controversy on codeberg related to AI some people like me are fed up of github and are hosting their own forgejo instance.

I am available to create a PR for this, but i wanted confirmation from the maintainers before doing if this is a desirable feature or not.

[juliusmarminge]

This is already supported — Forgejo (and Gitea) shipped in #11436.

Same ask was tracked earlier in #2536 and #6767. No need for a new PR for basic provider support; thanks for offering!