chore: move CameraView logic to itself

GSS2.Test/MainWindow.axaml.cs

@@ -1,4 +1,5 @@
 using Avalonia.Controls;
+using Avalonia.Threading;
 
 namespace GSS2.Test;
 
@@ -7,22 +8,5 @@ public partial class MainWindow : Window
     public MainWindow()
     {
         InitializeComponent();
-        int i = 0;
-
-        PointerPressed += async (_, _) =>
-        {
-            var viewModel = DataContext as MainWindowViewModel;
-            if (viewModel is null)
-                return;
-
-            var result = await viewModel.CaptureImage(i++);
-            if (result is not null)
-            {
-                var (frameBuffer, streamConfiguration) = result.Value;
-                if (frameBuffer.Metadata.Status == LibCameraSharp.FrameMetadata.StatusEnum.FrameSuccess)
-                    // cameraView.Update(frameBuffer, streamConfiguration);
-                    (cameraView.Content as CameraViewModel)?.CallUpdate(frameBuffer, streamConfiguration);
-            }
-        };
     }
 }