make getvol use pamixer

examples/eww-bar/scripts/getvol

@@ -1,7 +1,12 @@
 #!/bin/sh
 
-if command -v pactl &>/dev/null; then
-    pactl get-sink-volume $(pactl get-default-sink) | awk -F '[^0-9]+' '/left:/{print $3}'
+if command -v pamixer &>/dev/null; then
+    if [ true == $(pamixer --get-mute) ]; then
+        echo 0
+        exit
+    else
+        pamixer --get-volume
+    fi
 else
     amixer -D pulse sget Master | awk -F '[^0-9]+' '/Left:/{print $3}'
 fi