Enable `sphinx.ext.autodoc` and `sphinx.ext.napoleon` in `docs/conf.py` and add `docs/api/` with `automodule` entries. Add a `sphinx-build` CI step.
Enable
sphinx.ext.autodocandsphinx.ext.napoleonindocs/conf.pyand adddocs/api/withautomoduleentries. Add asphinx-buildCI step.