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-toggle-crash-capture

@@ -11,8 +11,8 @@ omarchy-toggle crash-capture-off
 # starting only settles this session; the next login reads the flag itself.
 if omarchy-toggle-enabled crash-capture-off; then
   systemctl --user stop omarchy-crash-watch.service
-  omarchy-notification-send -g "$CRASH_GLYPH" "Crash capture disabled"
+  omarchy-notification-send -g "$CRASH_GLYPH" "$(omarchy-text "Crash capture disabled")"
 else
   systemctl --user start omarchy-crash-watch.service
-  omarchy-notification-send -g "$CRASH_GLYPH" "Crash capture enabled"
+  omarchy-notification-send -g "$CRASH_GLYPH" "$(omarchy-text "Crash capture enabled")"
 fi