So I went on a quest to ask major Git forges (Github, Gitlab, Codeberg / Forgejo) to support README.html. Easy, right? Markdown and other things already compile to HTML and one only needs to sanitize the provided README and let the browser render it. No biggie. Except none of the forges really wanted to, and are unlikely to support my beloved README.html anytime soon. But this comment is kinda good, regardless of whether the feature is ever going to be added anywhere: https://codeberg.org/forgejo/forgejo/issues/10955#issuecomment-10032756