Replace AutoCompleteBox demo data with ControlData

Co-authored-by: rabbitism <14807942+rabbitism@users.noreply.github.com>

demo/Ursa.Demo/Models/ControlData.cs

@@ -0,0 +1,7 @@
+namespace Ursa.Demo.Models;
+
+public class ControlData
+{
+    public required string MenuHeader { get; init; }
+    public required string Chinese { get; init; }
+}