Add copyright and license notices

src/Error.cs

@@ -1,4 +1,7 @@
-using System;
+// Copyright (c) 2026 Viktor Stojanović. All rights reserved.
+// Licensed under the MIT License. See LICENSE.txt in the project root for license information.
+
+using System;
 
 namespace UnmanagedResult;
 

src/IError.cs

@@ -1,4 +1,7 @@
-namespace UnmanagedResult;
+// Copyright (c) 2026 Viktor Stojanović. All rights reserved.
+// Licensed under the MIT License. See LICENSE.txt in the project root for license information.
+
+namespace UnmanagedResult;
 
 public interface IError
 {

src/IResult.cs

@@ -1,4 +1,7 @@
-namespace UnmanagedResult;
+// Copyright (c) 2026 Viktor Stojanović. All rights reserved.
+// Licensed under the MIT License. See LICENSE.txt in the project root for license information.
+
+namespace UnmanagedResult;
 
 public interface IResult<TValue, TError>
     where TValue : unmanaged

src/Result.cs

@@ -1,4 +1,7 @@
-using System;
+// Copyright (c) 2026 Viktor Stojanović. All rights reserved.
+// Licensed under the MIT License. See LICENSE.txt in the project root for license information.
+
+using System;
 
 namespace UnmanagedResult;