Add code examples, and documentation

patterns/facade/CarEngineFacade/Facade.cs

@@ -0,0 +1,29 @@
+namespace CarEngineFacade;
+
+public class Facade
+{
+   private readonly AirFlowController _air = new();
+   private readonly CatalyticConverter _cat = new();
+   private readonly CoolingController _cool = new();
+   private readonly FuelInjector _fuel = new();
+   private readonly Starter _start = new();
+
+   public void Start()
+   {
+      _air.TakeAir();
+      _fuel.On();
+      _fuel.Inject();
+      _start.Start();
+      _cool.Run();
+      _cat.On();
+   }
+
+   public void Stop()
+   {
+      _fuel.Off();
+      _cat.Off();
+      _cool.Cool();
+      _cool.Stop();
+      _air.Off();
+   }
+}