Add license headers to Uno head platform files

The new Uno.Sdk head platform entry-point files (Desktop/WebAssembly/
Android/iOS) were missing the standard .NET Foundation license header.
Consumers that enforce IDE0073 (file header required) as an error — like
CommunityToolkit/Windows — fail to build the Uno head without them.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: MartinZikmund

ProjectHeads/AllComponents/Uno/Platforms/Android/Main.Android.cs

@@ -1,3 +1,7 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
 using Android.App;
 using Android.Runtime;
 
@@ -16,4 +20,4 @@ public Application(IntPtr javaReference, JniHandleOwnership transfer)
         : base(() => new CommunityToolkit.App.Shared.App(), javaReference, transfer)
     {
     }
-}
+}

ProjectHeads/AllComponents/Uno/Platforms/Android/MainActivity.Android.cs

@@ -1,3 +1,7 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
 using Android.App;
 using Android.Content.PM;
 using Android.OS;
@@ -13,4 +17,4 @@ namespace CommunityToolkit.App.Uno;
 )]
 public class MainActivity : Microsoft.UI.Xaml.ApplicationActivity
 {
-}
+}

ProjectHeads/AllComponents/Uno/Platforms/Desktop/Program.cs

@@ -1,3 +1,7 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
 using Uno.UI.Hosting;
 using CommunityToolkit.App.Shared;
 
@@ -16,4 +20,4 @@ public static void Main(string[] args)
 
         host.Run();
     }
-}
+}

ProjectHeads/AllComponents/Uno/Platforms/WebAssembly/Program.cs

@@ -1,3 +1,7 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
 using Uno.UI.Hosting;
 using CommunityToolkit.App.Shared;
 
@@ -12,4 +16,4 @@ public static async Task Main(string[] args)
 
         await host.RunAsync();
     }
-}
+}

ProjectHeads/AllComponents/Uno/Platforms/iOS/Main.iOS.cs

@@ -1,3 +1,7 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
 using Uno.UI.Hosting;
 using CommunityToolkit.App.Shared;
 
@@ -14,4 +18,4 @@ public static void Main(string[] args)
 
         host.Run();
     }
-}
+}

ProjectHeads/SingleComponent/Uno/Platforms/Android/Main.Android.cs

@@ -1,3 +1,7 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
 using Android.App;
 using Android.Runtime;
 
@@ -16,4 +20,4 @@ public Application(IntPtr javaReference, JniHandleOwnership transfer)
         : base(() => new CommunityToolkit.App.Shared.App(), javaReference, transfer)
     {
     }
-}
+}

ProjectHeads/SingleComponent/Uno/Platforms/Android/MainActivity.Android.cs

@@ -1,3 +1,7 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
 using Android.App;
 using Android.Content.PM;
 using Android.OS;
@@ -13,4 +17,4 @@ namespace CommunityToolkit.App.Uno;
 )]
 public class MainActivity : Microsoft.UI.Xaml.ApplicationActivity
 {
-}
+}

ProjectHeads/SingleComponent/Uno/Platforms/Desktop/Program.cs

@@ -1,3 +1,7 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
 using Uno.UI.Hosting;
 using CommunityToolkit.App.Shared;
 
@@ -16,4 +20,4 @@ public static void Main(string[] args)
 
         host.Run();
     }
-}
+}

ProjectHeads/SingleComponent/Uno/Platforms/WebAssembly/Program.cs

@@ -1,3 +1,7 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
 using Uno.UI.Hosting;
 using CommunityToolkit.App.Shared;
 
@@ -12,4 +16,4 @@ public static async Task Main(string[] args)
 
         await host.RunAsync();
     }
-}
+}

ProjectHeads/SingleComponent/Uno/Platforms/iOS/Main.iOS.cs

@@ -1,3 +1,7 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
 using Uno.UI.Hosting;
 using CommunityToolkit.App.Shared;
 
@@ -14,4 +18,4 @@ public static void Main(string[] args)
 
         host.Run();
     }
-}
+}