Merge desktop presets into main presets

presets are skipped if the corresponding service isn't installed,
so let's merge the desktop preset into the main ones. This shouldn't
change behavior.

Author: DaanDeMeyer

mkosi.extra/usr/lib/systemd/system-preset/10-particleos.preset

@@ -19,3 +19,4 @@ enable systemd-homed-firstboot.service
 disable avahi.*
 
 enable pcscd.service
+enable power-profiles-daemon.service

mkosi.extra/usr/lib/systemd/user-preset/10-particleos.preset

@@ -2,3 +2,4 @@
 
 enable ssh-agent.service
 enable p11-kit-server.service
+enable pipewire.service