Fix directory structure

src/ClipCmd.Desktop/Program.cs

@@ -0,0 +1,29 @@
+using Avalonia;
+using Avalonia.ReactiveUI;
+
+using System;
+
+namespace ClipCmd.Desktop;
+
+internal static class Program
+{
+    // Initialization code. Don't use any Avalonia, third-party APIs or any
+    // SynchronizationContext-reliant code before AppMain is called: things aren't initialized
+    // yet and stuff might break.
+    [STAThread]
+    public static void Main(string[] args)
+    {
+        _ = BuildAvaloniaApp()
+        .StartWithClassicDesktopLifetime(args);
+    }
+
+    // Avalonia configuration, don't remove; also used by visual designer.
+    public static AppBuilder BuildAvaloniaApp()
+    {
+        return AppBuilder.Configure<App>()
+                .UsePlatformDetect()
+                .WithInterFont()
+                .LogToTrace()
+                .UseReactiveUI();
+    }
+}