Install-debian.sh unusable

I was puttering around with some stuff, and noticed that the install-debian.sh script isn’t usable on modern systems (still has a bunch of python2 stuff in it).

Should it be updated, or removed in favor of kiauh?. I’ll submit a p.r. either way, but just want to know which direction I should jump.

See Debian changed from python2 to python3 by sysdef · Pull Request #6880 · Klipper3d/klipper · GitHub