LaTeX is great, but I prefer Markdown for software documentation (bonus points if your flavor of markdown supports LaTeX-style math). Standard LaTeX is geared towards typesetting and formatting, which is great for reports and journals, but not so much for software documentation, so you end up with a lot of boilerplate. Markdown syntax is also more accessible to beginners, I feel. And if you have a really big project that requires features like cross-references, there’s things like myst markdown.