neteja tidy: ranges::fill, default member init, NOLINT _USE_MATH_DEFINES

source/core/resources/resource_loader.cpp

@@ -9,9 +9,7 @@
 
 std::unique_ptr<ResourceLoader> ResourceLoader::instance = nullptr;
 
-ResourceLoader::ResourceLoader()
-    : resource_pack_(nullptr),
-      fallback_to_files_(true) {}
+ResourceLoader::ResourceLoader() = default;
 
 auto ResourceLoader::getInstance() -> ResourceLoader& {
     if (!instance) {