feat: add model / texture cooking

TextureCooker.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include <filesystem>
+
+namespace fs = std::filesystem;
+
+class TextureCooker
+{
+public:
+    // Returns true if rebuilt. Throws when the image can't be decoded.
+    bool CookFileIfNeeded(const fs::path& source, const fs::path& output) const;
+
+    static fs::path MakeOutputPath(const fs::path& dstLikeSrc);
+
+private:
+    static bool NeedsRebuild(const fs::path& source, const fs::path& output);
+};