Split cmus pulseaudio support as subpackage
The recent MR !41758 (merged) added pulseaudio-dev
into makedepends
, but that caused a warning when starting cmus
due to the missing runtime dependency libpulse
.
This MR moves the dependency onto a subpackage cmus-pulseaudio
which adds the actual PulseAudio support to cmus
but also enforces the installation of libpulse
.