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/FileSystem/IPackage.cs

@@ -0,0 +1,42 @@
+#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;
+using System.Collections.Generic;
+using System.IO;
+
+namespace OpenRA.FileSystem
+{
+	public interface IPackageLoader
+	{
+		/// <summary>
+		/// Attempt to parse a stream as this type of package.
+		/// If successful, the loader is expected to take ownership of `s` and dispose it once done.
+		/// If unsuccessful, the loader is expected to return the stream position to where it started.
+		/// </summary>
+		bool TryParsePackage(Stream s, string filename, FileSystem context, out IReadOnlyPackage package);
+	}
+
+	public interface IReadOnlyPackage : IDisposable
+	{
+		string Name { get; }
+		IEnumerable<string> Contents { get; }
+		Stream GetStream(string filename);
+		bool Contains(string filename);
+		IReadOnlyPackage OpenPackage(string filename, FileSystem context);
+	}
+
+	public interface IReadWritePackage : IReadOnlyPackage
+	{
+		void Update(string filename, byte[] contents);
+		void Delete(string filename);
+	}
+}