Create Proper User Facing Documentation

[leighmacdonald]

Getting closer to needing some real docs for people to use. A lot of the configuration and setup is not documented at all or somewhat outdated.

Prefer markdown, but rst is ok. Needs to be capable of being rebuilt / deployed on push

Static site generators are likely the best choice. There is a few options at:

• https://www.gitbook.com/
• https://about.readthedocs.com/ (basically a sphinx theme?)
• https://github.com/mkdocs/mkdocs/tree/master
• https://github.com/sphinx-doc/sphinx
• https://vitepress.dev/