- Add cliphist.service that wipes clipboard history on session start
(crash-safe: cleans up at next boot, not at shutdown)
- Move kanshi, walker, nautilus services from ~/.config/systemd/user/
to /etc/systemd/user/ (system-level defaults, consistent with
moonarch's config philosophy)
- Remove cliphist spawn-sh-at-startup from niri config (managed by
systemd service now)
- Add cliphist to USER_SERVICES in post-install.sh and transform.sh
Closes#1
