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-qr

@@ -23,7 +23,7 @@ SELECTION=$(slurp 2>/dev/null)
 RESULT=$(grim -g "$SELECTION" - | zbarimg -q --raw -Sdisable -Sqrcode.enable - 2>/dev/null)
 
 if [[ -z $RESULT ]]; then
-  omarchy-notification-send -g 󰐲 -u critical "No QR code found" "Select a region containing a QR code"
+  omarchy-notification-send -g 󰐲 -u critical "$(omarchy-text "No QR code found")" "$(omarchy-text "Select a region containing a QR code")"
   exit 1
 fi
 
@@ -33,4 +33,4 @@ fi
 # the notification history, and an unmarked copy would be retained by clipboard
 # history. Pasting still works; only the recorded copy is given up.
 printf '%s' "$RESULT" | wl-copy --sensitive
-omarchy-notification-send -g 󰐲 "QR code copied to clipboard"
+omarchy-notification-send -g 󰐲 "$(omarchy-text "QR code copied to clipboard")"