sterni's Advent of Code 2022

I'm trying to do it in BQN again to redeem myself for my unfinished AoC 2021, but will allow myself falling back to another language if I get stuck, so I actually complete this one. I also plan to write additional solutions in Nix (when I have the time) in order to throw //tvix/eval against some new problems. We'll see how it goes, as my December promises to be quite busy.