ForgeFed End-to-end Testing

End to end tools for federation - end to end tests for Forgejo - able to spawn multiple instances of Forgejo or other forges (GitLab etc.) and ActivityPub compliant software (GTS, Mastodon) to provide an environment where federation features scenario can be implemented.

That is now in place. End-to-end testing of ActivityPub federation begins.

The goal is to add end to end tests for Federated user activity following #4767 that run in the CI. The simplest path is to improve upon end-to-end/federation and add mastodon to the mix. There is no packaging needed to reach that goal.

Forgejo Localisation Tooling(?)

(Unclear.)