www/codeberg-pages-server: New port: "Github Pages"-like pages server for Gitea/Forgejo

Gitea lacks the ability to host static pages from Git. The Codeberg
Pages Server addresses this lack by implementing a standalone service
that connects to Gitea via API. It is suitable to be deployed by other
Gitea instances, too, to offer static pages hosting to their users.

https://codeberg.org/Codeberg/pages-server

PR: 284267