move xdg directories to the default location.

a lot of applications seem to hardcode this location, so it's better to
have something default, or default-adjasoned.

.local/bin/x-brightness-down

@@ -0,0 +1,4 @@
+#!/usr/bin/sh
+br=$(brightnessctl set 5%- |
+	grep '%' | awk '{print $4}' | sed 's/[^0-9]//g')
+notify-send -u low -i display-brightness-symbolic -h int:value:"$br" -h string:x-dunst-stack-tag:'brightnessctl' -a 'brightnessctl' "brightness: $br%"