Update ImageReader to reaad images without resizinf

Toolkit.Avalonia/ImageReader.cs

@@ -7,11 +7,23 @@ public class ImageReader(IImageResizer imageResizer) :
     IImageReader
 {
     public IImageDescriptor Get(Stream stream,
-        int width,
-        int height,
+        double width,
+        double height,
         bool maintainAspectRatio)
     {
-        Bitmap resizedImage = imageResizer.Resize(stream, width, height, maintainAspectRatio);
+        Bitmap resizedImage = imageResizer.Resize(stream,
+            width, 
+            height,
+            maintainAspectRatio);
+
         return new ImageDescriptor(resizedImage, width, height);
     }
+
+    public IImageDescriptor Get(Stream stream)
+    {
+        Bitmap image = new(stream);
+        return new ImageDescriptor(image,
+            image.Size.Width,
+            image.Size.Height);
+    }
 }