docs: fix README, remove gtklock and wlogout remnants

README: fix keybind (wlogout → moonset), remove gtklock from project
structure, correct package counts, remove nonexistent install-themes.sh,
mark update.sh as legacy wrapper.
Remove gtklock packages (5) and wlogout from package lists.
Remove defaults/xdg/gtklock/ config directory.
Remove stale foot/waybar overrides from transform.sh.

scripts/transform.sh

@@ -285,10 +285,6 @@ done
 log "Deploying moonarch config overrides..."
 cp /usr/share/moonarch/walker-config.toml "$HOME/.config/walker/config.toml"
 log "  + walker/config.toml"
-cp /usr/share/moonarch/foot/foot.ini "$HOME/.config/foot/foot.ini"
-log "  + foot/foot.ini"
-cp /usr/share/moonarch/waybar/style.css "$HOME/.config/waybar/style.css"
-log "  + waybar/style.css"
 
 # Deploy user defaults (overwrite, no existence check)
 log "Deploying user config defaults to ~/.config/ (overwrite)..."