Add foundation

Toolkit.Foundation/ConfigurationFile.cs

@@ -0,0 +1,11 @@
+using Microsoft.Extensions.FileProviders;
+
+namespace Toolkit.Foundation;
+
+public class ConfigurationFile<TConfiguration>(IFileInfo fileInfo) : 
+    IConfigurationFile<TConfiguration>
+    where TConfiguration :
+    class
+{
+    public IFileInfo FileInfo => fileInfo;
+}