sway: Add bindings for audio volume control based on WirePlumber

sway/.config/sway/config

@@ -237,6 +237,11 @@ bindsym Shift+F10 exec grimshot --notify save screen
 bindsym Ctrl+Tab workspace next
 bindsym Ctrl+grave workspace prev
 
+# Audio volume (WirePlumber)
+bindsym --locked XF86AudioRaiseVolume exec "wpctl set-volume @DEFAULT_AUDIO_SINK@ 2%+"
+bindsym --locked XF86AudioLowerVolume exec "wpctl set-volume @DEFAULT_AUDIO_SINK@ 2%-"
+bindsym --locked XF86AudioMute exec "wpctl set-mute @DEFAULT_AUDIO_SINK@ toggle"
+
 bar {
     swaybar_command waybar
 }