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.

.config/polybar/launch.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+# quit already running instances (if ipc is enabled)
+polybar-msg cmd quit
+# killall -q polybar
+
+polybar top & disown
+# polybar bot & disown