fix: Add TypeForwardedTo attribute to forward IFileSystem usage to its new… (#1338)

add TypeForwardedTo attribute to forward IFileSystem usage to its new assembly Testably.Abstractions.FileSystem.Interface

Co-authored-by: borisforzun <[email protected]>

Author: borisf94

src/TestableIO.System.IO.Abstractions/AssemblyRedirects.cs

@@ -0,0 +1,4 @@
+using System.IO.Abstractions;
+using System.Runtime.CompilerServices;
+
+[assembly: TypeForwardedTo(typeof(IFileSystem))]