refactor: extreure helpers per reduir complexitat cognitiva (tidy net)

source/core/resources/resource_cache.hpp

@@ -4,10 +4,12 @@
 
 #include <cstddef>
 #include <cstdint>
+#include <functional>
 #include <memory>
 #include <string>
 #include <vector>
 
+#include "core/resources/resource_list.hpp"
 #include "core/resources/resource_types.hpp"
 
 namespace Resource {
@@ -56,6 +58,8 @@ namespace Resource {
         void loadOneSound(size_t index);
         void loadOneBitmap(size_t index);
         void loadOneTextFile(size_t index);
+        void stepEachInList(List::Type type, const std::function<void()>& clear_fn, LoadStage next, const std::function<void(size_t)>& load_fn);
+        void stepTextFiles();
 
         std::vector<MusicResource> musics_;
         std::vector<SoundResource> sounds_;