feature request: support full CSIu kitty keyboard protocol

[postsolar]

feature request: support full CSIu kitty keyboard protocol

[faho]

Fish does read shift-backspace in kitty, so this appears to be a foot issue to me?

I do not understand why shift-backspace would "resolve to text-only". I.e. even if you count backspace as "text", which it kinda is (ASCII 0x08), shift-backspace certainly is a modified key, so https://codeberg.org/dnkl/foot/issues/1642#issuecomment-1660461 kinda contradicts itself.

If foot thinks shift-backspace is easily mistyped and doesn't want to present it differently, that's their right.

Enabling the full shebang has issues in that it's a lot more to read and also breaks things much more when e.g. fish crashes without disabling the protocol - run kitten show_key -m kitty in bash and then kill -9 it, you'll end up with basically a broken shell. The current version will send some keys in a way bash won't understand, but the basics will still work so you can regain a functional shell via reset (or starting a new fish).