Add some systemd user units

Mostly for systemd integration of sway stuff.

See: https://github.com/swaywm/sway/wiki/Systemd-integration

systemd/swayidle.service

@@ -0,0 +1,17 @@
+[Unit]
+Description=Idle manager for Wayland
+Documentation=man:swayidle(1)
+BindsTo=sway-session.target
+
+[Service]
+Type=simple
+ExecStart=/usr/bin/swayidle -w \
+            timeout 300 'swaylock -f -c 000000 \
+                -i /home/aorth/Downloads/3121px-Jerusalem-2013-Temple_Mount-Dome_of_the_Rock-Detail_01.jpg' \
+            timeout 600 'swaymsg "output * dpms off"' \
+                resume 'swaymsg "output * dpms on"' \
+            before-sleep 'swaylock -f -c 000000 \
+                -i /home/aorth/Downloads/3121px-Jerusalem-2013-Temple_Mount-Dome_of_the_Rock-Detail_01.jpg'
+
+[Install]
+WantedBy=sway-session.target