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/modules/volume.ini

@@ -0,0 +1,8 @@
+[module/volume]
+type                            = internal/pulseaudio
+format-volume-prefix            = " "
+format-volume-prefix-foreground = ${colours.primary}
+format-volume                   = <label-volume>
+label-volume                    = %percentage%%
+label-muted                     = muted
+label-muted-foreground          = ${colours.disabled}