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-transcode

@@ -193,14 +193,14 @@ main() {
   output=$(output_path "$input" "$format" "$resolution")
 
   if [[ $type == "video" ]]; then
-    omarchy-notification-send -g  "Transcoding video…" "$(basename -- "$input") to $format ($resolution)"
+    omarchy-notification-send -g  "$(omarchy-text "Transcoding video…")" "$(omarchy-text "%1 to %2 (%3)" "$(basename -- "$input")" "$format" "$resolution")"
     transcode_video "$input" "$format" "$resolution" "$output"
     copy_to_clipboard "$output"
-    omarchy-notification-send -g  "Transcoded to $resolution $format" "Saved and copied to clipboard."
+    omarchy-notification-send -g  "$(omarchy-text "Transcoded to %1 %2" "$resolution" "$format")" "Saved and copied to clipboard."
   else
     transcode_picture "$input" "$format" "$resolution" "$output"
     copy_to_clipboard "$output"
-    omarchy-notification-send -g  "Transcoded to $resolution $format" "Saved and copied to clipboard."
+    omarchy-notification-send -g  "$(omarchy-text "Transcoded to %1 %2" "$resolution" "$format")" "Saved and copied to clipboard."
   fi
 }