fix(doctor): drop obsolete paru repo check, cover walker + nautilus

The `[moonarch-pkgbuilds]` paru-repo check was a false failure: that
mechanism was retired on 2026-04-20 and the install hook strips the
legacy paru.conf section on upgrade.

Audit of the rest of the doctor surfaced two related gaps — the
user-services loop skipped `walker.service` and `nautilus.service`,
even though moonarch-git ships both and enables them via
graphical-session.target.wants. Added them to the loop and filled in
the missing `wlsunset` in the CLAUDE.md listing.

CLAUDE.md

@@ -44,7 +44,7 @@ Waybar wird über `moonarch-waybar` gestartet (nicht direkt). Der Wrapper merged
 Diagnose-Script das den Systemzustand gegen moonarch-Defaults prüft:
 - Pakete (official.txt + aur.txt installiert? Orphans?)
 - System-Services (NetworkManager, bluetooth, greetd, ufw, auto-cpufreq, etc.)
-- User-Services (kanshi, stasis, cliphist-text, cliphist-image)
+- User-Services (kanshi, wlsunset, stasis, walker, nautilus, cliphist-text, cliphist-image)
 - Config-Dateien (SHA256-Vergleich deployed vs. moonarch-Default)
 - Helper-Scripts + Symlinks (moonup, moondoc)
 - System-Config (UFW, Pacman/Paru Repos, Default Shell)