Refactor: Streamline code formatting, introduce cleaner structure, and remove unused Class1. Add .editorconfig for consistent coding style.

ParentAvalonia/Program.cs

@@ -1,5 +1,5 @@
-using Avalonia;
-using System;
+using System;
+using Avalonia;
 
 namespace ParentAvalonia;
 
@@ -9,13 +9,8 @@ class Program
     // 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);
+    public static void Main(string[] args) => BuildAvaloniaApp().StartWithClassicDesktopLifetime(args);
 
     // Avalonia configuration, don't remove; also used by visual designer.
-    public static AppBuilder BuildAvaloniaApp()
-        => AppBuilder.Configure<App>()
-            .UsePlatformDetect()
-            .WithInterFont()
-            .LogToTrace();
+    public static AppBuilder BuildAvaloniaApp() => AppBuilder.Configure<App>().UsePlatformDetect().WithInterFont().LogToTrace();
 }