fix: create ublue-lightdm-workaround.sh

Using a workaround for lightdm from @jerbmega

etc/ublue-lightdm-workaround.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+if [ ! -d /var/cache/lightdm ]; then mkdir /var/cache/lightdm; fi
+if [ ! -d /var/log/lightdm ]; then mkdir /var/log/lightdm; fi
+if [ ! -d /var/lib/lightdm ]; then mkdir /var/lib/lightdm; fi
+if [ ! -d /var/lib/lightdm-data ]; then mkdir /var/lib/lightdm-data; fi
+
+getent group lightdm >/dev/null || groupadd -r lightdm
+getent passwd lightdm >/dev/null || useradd -g lightdm -M -d /var/lib/lightdm -s /sbin/nologin -r lightdm
+
+systemctl set-default graphical.target