Polybar: Add mpd module

.config/polybar/config

@@ -62,6 +62,7 @@ inherit = template/bar
 border-top-size = 1
 
 modules-left = i3 cpu memory battery temp
+modules-center = mpd
 modules-right = backlight pulse date
 
 [bar/secondary]
@@ -189,6 +190,15 @@ ramp-swap-used-6-foreground = ${res/colors.yellow}
 ramp-swap-used-7 = █
 ramp-swap-used-7-foreground = ${res/colors.red}
 
+[module/mpd]
+type = internal/mpd
+interval = 1
+
+format-online = <label-song> <label-time>
+format-offline-foreground = ${res/colors.bg-light}
+label-song = %artist% - %title%
+label-offline = mpd is offline
+
 [module/pulse]
 type = internal/pulseaudio
 format-volume = <ramp-volume> <label-volume>