feat: add external image loader for every supported game

src/ObjImage/Image/IwiLoader.h

@@ -1,11 +1,20 @@
 #pragma once
 
+#include "Image/IwiTypes.h"
 #include "Image/Texture.h"
 
 #include <istream>
 #include <memory>
+#include <optional>
 
 namespace image
 {
-    std::unique_ptr<Texture> LoadIwi(std::istream& stream);
+    struct IwiLoaderResult
+    {
+        IwiVersion m_version;
+        CommonIwiMetaData m_meta;
+        std::unique_ptr<Texture> m_texture;
+    };
+
+    std::optional<IwiLoaderResult> LoadIwi(std::istream& stream);
 }; // namespace image