install: better install + use data and state

Don't complete remove repos, use git pull instead
Use XDG_DATA_HOME and XDG_STATE_HOME

install/fuzzel.fish

@@ -4,25 +4,12 @@
 
 install-deps git fuzzel-git
 
-set -l systemd $CONFIG/../systemd/user
-set -l fuzzel $CONFIG/../fuzzel
+set -l dist $CONFIG/fuzzel
 
 # Clone repo
-confirm-overwrite $fuzzel
-git clone 'https://github.com/caelestia-dots/fuzzel.git' $fuzzel
+update-repo fuzzel $dist
 
 # Install systemd service
-if test -d $systemd
-    log 'Installing systemd service...'
-
-    echo "[Service]
-Type=oneshot
-ExecStart=$fuzzel/monitor/update.fish" > $systemd/fuzzel-monitor-scheme.service
-    cp $fuzzel/monitor/fuzzel-monitor-scheme.path $systemd/fuzzel-monitor-scheme.path
-
-    systemctl --user daemon-reload
-    systemctl --user enable --now fuzzel-monitor-scheme.path
-    systemctl --user start fuzzel-monitor-scheme.service
-end
+setup-systemd-monitor fuzzel $dist
 
 log 'Done.'