Remove ABOUTME comments from kanshi default config — they broke
the profile parser in wdisplays-persistent store.c, preventing
config saves. Also skip kanshi in transform.sh when user profiles
already exist, since display layouts are machine-specific.
- Add kanshi to official package list and spawn at niri startup
- Add empty default kanshi config in defaults/xdg/kanshi/
- Replace wdisplays-git with wdisplays-persistent-gettext in AUR list
