Wire up file size

Toolkit.Foundation/FileDescriptor.cs

@@ -1,4 +1,4 @@
 namespace Toolkit.Foundation;
 
-public record FileDescriptor(string Name, string Path, int Size) :
+public record FileDescriptor(string Name, string Path, long Size) :
     IFileDescriptor;

Toolkit.Foundation/IFileDescriptor.cs

@@ -6,5 +6,5 @@ public interface IFileDescriptor
 
     string Path { get; }
 
-    int Size { get; }
+    long Size { get; }
 }