added spotify metadata script to polybar

.config/polybar/spotifyd-meta.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env sh
+
+meta(){
+	metadata=$(playerctl -f "{{title}} - {{artist}}" metadata) && echo $metadata
+}
+
+i=0
+
+until meta || [  $i -gt 10 ];
+do 
+	sleep 1
+	let i=i+1
+done 
+
+exit $?
+