fix missing packages, remove dead code, replace ponymix with pactl

- Add wl-clipboard, libnotify, upower, bluez, bluez-utils to official.txt
- Remove stow (installed but never used)
- Remove dead moonlock.service cp block from post-install.sh
- Rewrite moonarch-sink-switcher and moonarch-volume to use pactl
  instead of ponymix (already available via libpulse)

defaults/bin/moonarch-volume

@@ -41,8 +41,8 @@ else
 	micon=''
 fi
 
-currentsink=$(ponymix defaults|awk '/^sink/ {s=$1" "$2;getline;gsub(/^ +/,"",$0);print s" "$0}' | cut -d':' -f2)
-currentsource=$(ponymix defaults|awk '/^source/ {s=$1" "$2;getline;gsub(/^ +/,"",$0);print s" "$0}' | cut -d':' -f2)
+currentsink=$(pactl get-default-sink)
+currentsource=$(pactl get-default-source)
 
 
 # Theme Elements