textproc/py-mkdocs-autorefs: New port

MkDocs generates anchors for each heading, and they can always be used
to link to something, either within the same page or by specifying the
path of the other page.

But with this plugin, you can link to a heading from any other page on
the site without needing to know the path of either of the pages, just
the heading title itself.

WWW: https://github.com/mkdocstrings/autorefs