Improve the documentation in relation to the code of the different projects

[hoh]

• [ ] https://github.com/koaning/mktestdocs #73
• [ ] https://github.com/manuzhang/mkdocs-htmlproofer-plugin
• [ ] https://github.com/mkdocs/mkdocs-redirects
• [ ] https://github.com/mkdocstrings/mkdocstrings

[hoh]

@Antonyjin has work in progress regarding [mktestdocs](https://github.com/koaning/mktestdocs)