sway: add audio hotkeys

config/sway/config.m4

@@ -72,6 +72,11 @@ ifelse(hostname, [petalius], [
   bindsym Shift+XF86MonBrightnessUp exec light -A 1
 ])
 
+bindsym --locked XF86AudioPlay exec playerctl play
+bindsym --locked XF86AudioPause exec playerctl pause
+bindsym --locked XF86AudioNext exec playerctl next
+bindsym --locked XF86AudioPrev exec playerctl previous
+
 # resize window (you can also use the mouse for that)
 mode "resize" {
         # These bindings trigger as soon as you enter the resize mode