Aigio L

- Use [Central Package Management (CPM)](https://docs.microsoft.com/en-us/nuget/consume-packages/central-package-management) unified management of nuget packages - Use .Net5+ new [OperatingSystem.IsWindows/IsMacOS ...](https://docs.microsoft.com/en-us/dotnet/api/system.operatingsystem.iswindows?view=net-6.0) API - Fix the type Avalonia.Win32.dll not being found when trimmed Avalonia.Win32.WindowImpl on...

https://github.com/CefNet/CefNet/issues/21 https://github.com/CefNet/CefNet/blob/90.5.21109.1453/CefNet/Input/KeycodeConverter.cs#L41 https://user-images.githubusercontent.com/24450093/116916319-bf957800-ac7f-11eb-96d9-244d7837a0b3.mp4

### 目标 ```net6.0-ios``` iPhone Native App ```net6.0-maccatalyst``` iPad/macOS Native App ```net6.0-android``` Android Native App ```net6.0-windows10.0.19041.0``` WinUI 3 App ### 工作项 - [ ] 将之前的 Xamarin.Forms 项目中的 XAML 迁移到 MAUI 中...

https://github.com/BeyondDimension/SteamTools/issues/1992