use kitty launch command, make commands consistent
use kitty launch command, make commands consistent

`new-window` is a legacy command (see https://github.com/kovidgoyal/kitty/issues/2708).
`KITTY_WINDOW_ID` should be set for any kitty window anyways.

danr/kakoune,jkonecny12/kakoune,mawww/kakoune,casimir/kakoune,jkonecny12/kakoune,lenormf/kakoune,Somasis/kakoune,casimir/kakoune,danr/kakoune,danr/kakoune,alexherbo2/kakoune,alexherbo2/kakoune,jkonecny12/kakoune,alexherbo2/kakoune,Somasis/kakoune,mawww/kakoune,danr/kakoune,jkonecny12/kakoune,casimir/kakoune,lenormf/kakoune,Somasis/kakoune,lenormf/kakoune,casimir/kakoune,lenormf/kakoune,mawww/kakoune,mawww/kakoune,alexherbo2/kakoune,Somasis/kakoune