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.

shell/plugins/bar/widgets/Microphone.qml

@@ -1,6 +1,7 @@
 import QtQuick
 import Quickshell
 import Quickshell.Services.Pipewire
+import qs.Commons
 import qs.Ui
 import qs.Commons
 
@@ -57,7 +58,7 @@ BarWidget {
     bar: root.bar
     text: root.muted ? "󰍭" : "󰍬"
     active: root.inUse
-    tooltipText: root.muted ? "Microphone muted" : (root.inUse ? "Microphone in use" : "Microphone live")
+    tooltipText: root.muted ? I18n.tr("Microphone muted") : (root.inUse ? I18n.tr("Microphone in use") : I18n.tr("Microphone live"))
     onPressed: function(b) {
       if (b === Qt.MiddleButton) root.bar.run("omarchy-shell shell toggle omarchy.audio")
       else root.toggleMute()