ExportPhotos: load images async'ly

Program.cs

@@ -233,7 +233,7 @@ public class Photo {
     Console.WriteLine("saving " + filename);
     // FIXME: update JPEG metadata.
     // FIXME: warn if the file already exists?
-    using (Image<Rgba32> image = Image.Load<Rgba32>(Filename)) {
+    using (Image<Rgba32> image = await Image.LoadAsync<Rgba32>(Filename)) {
       // Util.RotateImageFromExif(image, Orientation);
       await image.SaveAsync(filename, encoder);
     }
@@ -804,8 +804,8 @@ public class Game : GameWindow {
 
     // Load photos from a directory.
     // string[] files = Directory.GetFiles(@"c:\users\colin\desktop\photos-test\");
-    // string[] files = Directory.GetFiles(@"c:\users\colin\pictures\photos\2023\07\14\");
-    string[] files = Directory.GetFiles(@"G:\DCIM\100EOSR6\");
+    string[] files = Directory.GetFiles(@"c:\users\colin\pictures\photos\2023\07\14\");
+    // string[] files = Directory.GetFiles(@"G:\DCIM\100EOSR6\");
     // string[] files = Directory.GetFiles(@"C:\Users\colin\Pictures\photos\2018\06\23");
     // string[] files = Directory.GetFiles(@"C:\Users\colin\Desktop\Germany all\104D7000");
     // string[] files = Directory.GetFiles(@"C:\Users\colin\Desktop\many-birds\");