Rework file extraction to combine the old and new methods

Wabbajack.VirtualFileSystem/FileExtractor2/ExtractedFiles/ExtractedMemoryfile.cs

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+using System;
+using System.IO;
+using System.Threading.Tasks;
+using Wabbajack.Common;
+
+namespace Wabbajack.VirtualFileSystem.ExtractedFiles
+{
+    public class ExtractedMemoryFile : IExtractedFile
+    {
+        private IStreamFactory _factory;
+
+        public ExtractedMemoryFile(IStreamFactory factory)
+        {
+            _factory = factory;
+        }
+
+
+        public ValueTask<Stream> GetStream()
+        {
+            return _factory.GetStream();
+        }
+
+        public DateTime LastModifiedUtc => _factory.LastModifiedUtc;
+        public IPath Name => _factory.Name;
+        public async ValueTask Move(AbsolutePath newPath)
+        {
+            await using var stream = await _factory.GetStream();
+            await newPath.WriteAllAsync(stream);
+        }
+
+        public bool CanMove { get; set; } = true;
+    }
+}

Wabbajack.VirtualFileSystem/FileExtractor2/ExtractedFiles/ExtractedNativeFile.cs

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+using System.Threading.Tasks;
+using Wabbajack.Common;
+
+namespace Wabbajack.VirtualFileSystem.ExtractedFiles
+{
+    public class ExtractedNativeFile : NativeFileStreamFactory, IExtractedFile
+    {
+        public bool CanMove { get; set; } = true;
+
+        public ExtractedNativeFile(AbsolutePath file, IPath path) : base(file, path)
+        {
+        }
+
+        public ExtractedNativeFile(AbsolutePath file) : base(file)
+        {
+        }
+
+        public async ValueTask Move(AbsolutePath newPath)
+        {
+            if (CanMove) 
+                await _file.MoveToAsync(newPath, overwrite: true);
+            else 
+                await _file.CopyToAsync(newPath);
+        }
+    }
+}

Wabbajack.VirtualFileSystem/FileExtractor2/ExtractedFiles/IExtractedFile.cs

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+using System.IO;
+using System.Threading.Tasks;
+using Wabbajack.Common;
+
+namespace Wabbajack.VirtualFileSystem.ExtractedFiles
+{
+    public interface IExtractedFile : IStreamFactory
+    {
+        /// <summary>
+        /// Possibly destructive move operation. Should greatly optimize file copies when the file
+        /// exists on the same disk as the newPath. Performs a copy if a move is not possible.
+        /// </summary>
+        /// <param name="newPath">destination to move the entry to</param>
+        /// <returns></returns>
+        public ValueTask Move(AbsolutePath newPath);
+        
+        public bool CanMove { get; set; }
+    }
+}