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-capture-screenrecording-with-webcam

@@ -5,7 +5,7 @@
 
 mapfile -t devices < <(omarchy-capture-webcam-list)
 if (( ${#devices[@]} == 0 )); then
-  omarchy-notification-send "No webcam devices found" -u critical -t 3000
+  omarchy-notification-send "$(omarchy-text "No webcam devices found")" -u critical -t 3000
   exit 1
 fi