For help documentation I wrote my own tool to format things the way I wanted for the console (e.g. colorized, adjusting to console width).

For the website, I'm using wix. I'm open to suggestions for using wix better, or choosing an alternative.

Oh, interesting, Wix wasn't even on my list for consideration. I like the look of it, but I also want to pull in some of my documentation from docstrings, possibly, so I think reStructuredText is a leading contender. That's what I'm getting ready to try setting up in my github workflow to see if I can get it to automatically format and publish the documentation to a github pages site.

I'm working on a not entirely dissimilar project (mine is focused more towards: fabric/ansible/cookiecutter type workflows, leaning on a lot of shell semantics. My workflows and hopefully soon documentation may be useful to you, I'd be happy to contribute them. I auto-build and publish releases to pypi. Project is: https://github.com/linsomniac/uplaybook