For example, if I want to collaborate on making a (non-computer related) textbook with someone, and we want to use git as a version control system. Should we use github/codeberg for this or is there a platform that’s more suitable for using git in nontechnical contexts?


pandoc. Converts markdown to html, latex, pdf, and Word.
It serves as the backend behind basically every program that support some kind of rendering of markdown, e.g. quarto, ipython notebooks.
Pandoc - Pandoc User’s Guide - https://pandoc.org/MANUAL.html