Add initial test for game cooking (use one of the Flax Samples project)

.github/data/ExitOnEsc.cs

@@ -0,0 +1,11 @@
+using FlaxEngine;
+
+public class ExitOnEsc : Script
+{
+    /// <inheritdoc />
+    public override void OnUpdate()
+    {
+        // Exit as soon as game starts update loaded level
+        Engine.RequestExit();
+    }
+}