Start lorri with sytemd

Whenever possible, prefer starting things as systemd units instead of
instantiating them in ~/.profile and other dotfiles.

configs/shared/.config/systemd/user/lorri.service

@@ -0,0 +1,12 @@
+[Unit]
+ConditionUser=!@system
+Description=Lorri build daemon
+After=lorri.socket
+Wants=lorri.socket
+
+[Service]
+ExecStart=%h/.nix-profile/bin/lorri daemon
+PrivateTmp=true
+ProtectSystem=strict
+Restart=on-failure
+WorkingDirectory=%h

configs/shared/.config/systemd/user/lorri.socket

@@ -0,0 +1,9 @@
+[Unit]
+Description=Lorri build daemon
+
+[Socket]
+ListenStream=%t/lorri/daemon.socket
+RuntimeDirectory=lorri
+
+[Install]
+WantedBy=sockets.target