Initial commit: OpenRA game engine

Fork from OpenRA/OpenRA with one-click launch script (start-ra.cmd)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

OpenRA.Game/Activities/CallFunc.cs

@@ -0,0 +1,33 @@
+#region Copyright & License Information
+/*
+ * Copyright (c) The OpenRA Developers and Contributors
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System;
+
+namespace OpenRA.Activities
+{
+	public class CallFunc : Activity
+	{
+		public CallFunc(Action a) { this.a = a; }
+		public CallFunc(Action a, bool interruptible)
+		{
+			this.a = a;
+			IsInterruptible = interruptible;
+		}
+
+		readonly Action a;
+
+		public override bool Tick(Actor self)
+		{
+			a.Invoke();
+			return true;
+		}
+	}
+}