Add project files.

Hyperbar.Desktop/AppInitializer.cs

@@ -0,0 +1,21 @@
+using Hyperbar.Desktop.Controls;
+using Microsoft.Extensions.DependencyInjection;
+using System.Threading.Tasks;
+
+namespace Hyperbar.Desktop;
+
+public class AppInitializer([FromKeyedServices("Commands")] CommandView view,
+    [FromKeyedServices("Commands")] CommandViewModel viewModel,
+    DesktopFlyout desktopFlyout) : 
+    IInitializer
+{
+    public Task InitializeAsync()
+    {
+        view.DataContext = viewModel;
+
+        desktopFlyout.Placement = DesktopFlyoutPlacement.Top;
+        desktopFlyout.Content = view;
+
+        return Task.CompletedTask;
+    }
+}