Debian's which hunt

Which ironically, `type -p` is a GNU specific option and isn't POSIX compliant, as far as I can tell. I think I have the correct version here, but skimming the POSIX shell standard, it seems that the specification for the `type` utility doesn't list any options:
- OpenGroup link: https://pubs.opengroup.org/onlinepubs/9699919799/utilitie...
- Linux POSIX man page link: https://man7.org/linux/man-pages/man1/type.1p.html

Figured it was worth mentioning since a decent chunk of the article discussion is about how `command -v` is the POSIX way to find a command rather than `which`