docs(category_theory/limits): adding many docstrings (#2185)
* lots of comments!
* remove #lint
* Apply suggestions from code review
lots of missing "co"s
Co-Authored-By: Johan Commelin <johan@commelin.net>
Co-authored-by: Johan Commelin <johan@commelin.net>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
