refactor: restructure image dumper

src/ObjWriting/Game/IW4/Image/ImageDumperIW4.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#include "Dumping/AbstractAssetDumper.h"
+#include "Game/IW4/IW4.h"
+#include "Image/IImageWriter.h"
+
+#include <memory>
+
+namespace IW4::image
+{
+    class Dumper final : public AbstractAssetDumper<GfxImage>
+    {
+    public:
+        Dumper();
+
+    protected:
+        bool ShouldDump(XAssetInfo<GfxImage>* asset) override;
+        void DumpAsset(AssetDumpingContext& context, XAssetInfo<GfxImage>* asset) override;
+
+    private:
+        std::unique_ptr<IImageWriter> m_writer;
+    };
+} // namespace IW4::image