I'm sorry if expected to find some p*rn here. This is a kernel for educational reasons!
There's a nix-flake so you just need to execute nix develop and have all dependencies installed!
Otherwise you'll need just, make, libisoburn and qemu.
Afterwards just execute just run.
Well, because this is the dumbest name I could find. Imagine a discussion between two people like this:
A: Hey, I use Arch btw. which OS are you using?
B: Oh nice, I use PornOS 24/7.
A: Oh cool, never heard of i- wait a minute. What did you just say?
This is a kernel to learn how to write a kernel. It's not meant to be used in production! I'm not responsible if you're running it on your real system and some stuff might get broken!