Add Simplified Chinese as a system language

The installer asks for the language before the keyboard, and
Setup > Language (omarchy language en|zh) switches it later. Under
zh_CN the menu reads its labels from omarchy-menu.zh-cn.jsonc, the
shell from I18nZh.js through I18n.tr, and notifications are worded
by their sender through omarchy-text, which reads the same table.
User text is never translated.

bin/omarchy-launch-screensaver

@@ -16,7 +16,7 @@ terminal=$(xdg-terminal-exec --print-id)
 case $terminal in
 *Alacritty* | *ghostty* | *foot* | *kitty*) ;;
 *)
-  omarchy-notification-send -g ✋ "Screensaver only runs in Alacritty, Foot, Ghostty, or Kitty"
+  omarchy-notification-send -g ✋ "$(omarchy-text "Screensaver only runs in Alacritty, Foot, Ghostty, or Kitty")"
   exit 1
   ;;
 esac