feat(config): add projects-sync systemd service and timer

.chezmoiscripts/run_once_after_30-user-services.sh.tmpl

@@ -16,6 +16,12 @@ if [ -f "$HOME/.config/systemd/user/kitty-day-save.service" ] && command -v syst
     systemctl --user daemon-reload || true
     systemctl --user enable --now kitty-day-save.service || true
 fi
+
+# Symlink ~/Code repos into ~/Projects every 5 min (same role gate).
+if [ -f "$HOME/.config/systemd/user/projects-sync.timer" ] && command -v systemctl >/dev/null 2>&1; then
+    systemctl --user daemon-reload || true
+    systemctl --user enable --now projects-sync.timer || true
+fi
 {{ else -}}
 #!/bin/sh
 exit 0