For some reason the regular 'cat' completion does not work, perhaps
because it is regularly aliased to 'bat' on my systems. This manually
fixes it with a spec alias for carapace
(https://carapace-sh.github.io/carapace-bin/spec/run.html#alias)
Should find a better implementation over time but for now this is a
simple workaround. I do _not_ know how it interacts with systems when no
'bat' command is found.
