doxygen to sphinx

[justinmk]

trafficstars

Currently we use doxygen to generate C API docs in HTML form: https://neovim.io/doc/dev/

This project can convert doxygen to sphinx format.

For example, the vis project uses breathe to publish its C API docs to https://vis.readthedocs.io/en/master/

Other alternatives: https://github.com/michaeljones/breathe#alternatives

[justinmk]

Another alternative (avoids sphinx, author in markdown): MkDocs https://news.ycombinator.com/item?id=17716791