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-usb-authorization-event

@@ -125,8 +125,8 @@ while true; do
     --app-name omarchy-action \
     --urgency critical \
     --glyph 󰖀 \
-    "USB accessory blocked" \
-    "Click to review it. Keep it blocked unless you recognize the device." \
+    "$(omarchy-text "USB accessory blocked")" \
+    "$(omarchy-text "Click to review it. Keep it blocked unless you recognize the device.")" \
     --exec omarchy-launch-floating-terminal-with-presentation \
     omarchy-usb-authorization-review "$token"; then
     exit 0