I'm raising the severity because it looks doable for libgnomekbd to be
removed from Debian before Debian 14 is released.
budgie-control-center in experimental no longer uses libgnomekbd.
Cinnamon 6.6 no longer uses libgnomekbd according to
https://www.linuxmint.com/rel_zena_whatsnew.php
Cinnamon has a lot of components so I don't know if every piece was
ported away from libgnomekbd yet. (I know that cinnamon-screensaver
still uses caribou for instance.). Practically, libgnomekbd won't be
removed from Testing as long as Cinnamon uses it, according to the
current way Debian defines key packages.