refactor: extract image code into single component

src/ObjImage/Image/IwiLoader.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#include "Image/Texture.h"
+
+#include <istream>
+#include <memory>
+
+namespace iwi
+{
+    std::unique_ptr<Texture> LoadIwi(std::istream& stream);
+}; // namespace iwi