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/has_fields.hpp

@@ -0,0 +1,80 @@
+#ifndef RFL_INTERNAL_HASFIELDS_HPP_
+#define RFL_INTERNAL_HASFIELDS_HPP_
+
+#include <type_traits>
+#include <utility>
+
+#include "../Tuple.hpp"
+//#include "all_fields.hpp"
+#include "is_field.hpp"
+#include "is_flatten_field.hpp"
+#include "ptr_tuple_t.hpp"
+#include "is_named_tuple.hpp"
+
+
+namespace rfl {
+namespace internal {
+
+template <class TupleType>
+constexpr bool all_fields_or_flatten() {
+  const auto is_true_for_one =
+      []<int _i>(std::integral_constant<int, _i>) -> bool {
+    using T = std::remove_cvref_t<tuple_element_t<_i, TupleType>>;
+    if constexpr (is_flatten_field_v<T>) {
+      return all_fields_or_flatten<
+          ptr_tuple_t<typename std::remove_pointer_t<T>::Type>>();
+    } else {
+      return is_field_v<T>;
+    }
+  };
+
+  return [&]<int... _is>(std::integer_sequence<int, _is...>) {
+    return (true && ... && is_true_for_one(std::integral_constant<int, _is>{}));
+  }
+  (std::make_integer_sequence<int, rfl::tuple_size_v<TupleType>>());
+}
+
+template <class TupleType>
+constexpr bool some_fields_or_flatten() {
+  const auto is_true_for_one =
+      []<int _i>(std::integral_constant<int, _i>) -> bool {
+    using T = std::remove_cvref_t<tuple_element_t<_i, TupleType>>;
+    if constexpr (is_flatten_field_v<T>) {
+      return some_fields_or_flatten<
+          ptr_tuple_t<typename std::remove_pointer_t<T>::Type>>();
+    } else {
+      return is_field_v<T>;
+    }
+  };
+
+  return [&]<int... _is>(std::integer_sequence<int, _is...>) {
+    return (false || ... ||
+            is_true_for_one(std::integral_constant<int, _is>{}));
+  }
+  (std::make_integer_sequence<int, rfl::tuple_size_v<TupleType>>());
+}
+
+template <class T>
+constexpr bool has_fields() {
+  if constexpr (is_named_tuple_v<T>) {
+    return true;
+  } else {
+    using TupleType = ptr_tuple_t<T>;
+    if constexpr (some_fields_or_flatten<TupleType>()) {
+      static_assert(
+          all_fields_or_flatten<TupleType>(),
+          "If some of your fields are annotated using rfl::Field<...>, "
+          "then you must annotate all of your fields. "
+          "Also, you cannot combine annotated and "
+          "unannotated fields using rfl::Flatten<...>.");
+      return true;
+    } else {
+      return false;
+    }
+  }
+}
+
+}  // namespace internal
+}  // namespace rfl
+
+#endif