Add SilkActivity

Author: Perksey

sources/Windowing/Windowing/ISurfaceApplication.cs

@@ -1,7 +1,5 @@
 namespace Silk.NET.Windowing;
 
-using System.Runtime.Versioning;
-
 /// <summary>
 /// Represents an application running within a surface.
 /// </summary>
@@ -22,7 +20,6 @@ static abstract void Initialize<TSurface>(TSurface surface)
     /// Runs an application using the reference implementation of Silk.NET.Windowing.
     /// </summary>
     /// <typeparam name="T">The application.</typeparam>
-    [UnsupportedOSPlatform("android")]
     public static sealed partial void Run<T>()
         where T : ISurfaceApplication;
 }

sources/Windowing/Windowing/Implementations/SDL3/SilkActivity.cs

@@ -0,0 +1,14 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+#if ANDROID
+using Org.Libsdl.App;
+
+namespace Silk.NET.Windowing.SDL3;
+
+public abstract class SilkActivity<T> : SDLActivity
+    where T : ISurfaceApplication
+{
+    protected override void Main() => ISurfaceApplication.Run<T>();
+}
+#endif

sources/Windowing/Windowing/Silk.NET.Windowing.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFrameworks>net8.0;net9.0</TargetFrameworks>
+        <TargetFrameworks>net8.0;net9.0;net8.0-android;net9.0-android;net8.0-ios;net9.0-ios</TargetFrameworks>
         <ImplicitUsings>enable</ImplicitUsings>
         <Nullable>enable</Nullable>
         <NoWarn>0067</NoWarn> <!-- TODO -->