Add loading of iw3 fastfiles

src/ZoneLoading/Game/IW3/ZoneLoaderFactoryIW3.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#include "Loading/IZoneLoaderFactory.h"
+#include <string>
+
+namespace IW3
+{
+    class ZoneLoaderFactory final : public IZoneLoaderFactory
+    {
+        class Impl;
+
+    public:
+        ZoneLoader* CreateLoaderForHeader(ZoneHeader& header, std::string& fileName) override;
+    };
+}