dotfiles: move .config/* to root

This seems to make more sense. Almost all files were within .config
anyway.

Signed-off-by: Joe Groocock <me@frebib.net>

systemd/user/sleep-lock-lightdm.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=Lock X LightDM session before sleeping
+Requires=graphical-session.target
+Before=sleep.target
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/dm-tool switch-to-greeter
+# Ensure enough time for the session to lock before sleeping
+ExecStartPost=/usr/bin/sleep 1
+
+[Install]
+WantedBy=sleep.target