feat(reflect-cpp): Switched from glaze -> reflect cpp

A bug was discovered in glaze which prevented valid toml output. We have
switched to toml++ and reflect-cpp. The interface has remained the same
so this should not break any code

build-config/reflect-cpp/include/rfl/internal/flattened_ptr_tuple_t.hpp

@@ -0,0 +1,18 @@
+#ifndef RFL_INTERNAL_FLATTENED_PTR_TUPLE_T_HPP_
+#define RFL_INTERNAL_FLATTENED_PTR_TUPLE_T_HPP_
+
+#include <type_traits>
+
+#include "to_flattened_ptr_tuple.hpp"
+
+namespace rfl {
+namespace internal {
+
+template <class T>
+using flattened_ptr_tuple_t =
+    typename std::invoke_result<decltype(to_flattened_ptr_tuple<T>), T>::type;
+
+}  // namespace internal
+}  // namespace rfl
+
+#endif