chore: commit missing files

PcgsInv/Program.cs

@@ -0,0 +1,27 @@
+using System;
+using Avalonia;
+using ReactiveUI.Avalonia;
+
+namespace PcgsInv;
+
+internal sealed 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()
+        => AppBuilder.Configure<App>()
+            .UsePlatformDetect()
+            .UseReactiveUI(builder => builder.WithAvalonia())
+#if DEBUG
+            .WithDeveloperTools()
+#endif
+            .WithInterFont()
+            .LogToTrace();
+}