修复了 https://github.com/irihitech/Ursa.Avalonia/issues/753 当有多个外部 button绑定 不同类型的 NumericUpDown控件的时候，点击button会报错的问题

修正 IPv4Box.cs NumPad.cs NumPad.axaml 文件的编码格式为 utf-8

Semi.Avalonia.Demo.Desktop.Program 增加 SupportedOSPlatform

demo/Ursa.Demo.Desktop/Program.cs

@@ -1,10 +1,14 @@
-using System;
-using Avalonia;
+using Avalonia;
 using Avalonia.Dialogs;
 using Avalonia.Media;
+using System;
+using System.Runtime.Versioning;
 
 namespace Ursa.Demo.Desktop;
 
+[SupportedOSPlatform("windows")]
+[SupportedOSPlatform("linux")]
+[SupportedOSPlatform("macos")]
 class Program
 {
     // Initialization code. Don't use any Avalonia, third-party APIs or any