[4sem] isaip01 done

4sem/isaip/01/PlayfairCypher/Program.cs

@@ -0,0 +1,14 @@
+using Avalonia;
+using Avalonia.ReactiveUI;
+
+namespace PlayfairCypher {
+    internal static class Program {
+        public static void Main(string[] args) {
+            BuildAvaloniaApp().StartWithClassicDesktopLifetime(args);
+        }
+
+        private static AppBuilder BuildAvaloniaApp() {
+            return AppBuilder.Configure<App>().UsePlatformDetect().LogToTrace().UseReactiveUI();
+        }
+    }
+}