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/parsing/is_empty.hpp

@@ -0,0 +1,42 @@
+#ifndef RFL_PARSING_IS_EMPTY_HPP_
+#define RFL_PARSING_IS_EMPTY_HPP_
+
+#include <type_traits>
+
+#include "../internal/has_reflection_method_v.hpp"
+#include "../internal/has_reflection_type_v.hpp"
+#include "../internal/is_rename.hpp"
+#include "../internal/is_skip.hpp"
+#include "is_map_like.hpp"
+#include "is_vector_like.hpp"
+
+namespace rfl {
+namespace parsing {
+
+template <class T>
+static bool is_empty(const T& _var) {
+  using Type = std::remove_cvref_t<T>;
+  if constexpr (std::is_pointer_v<Type>) {
+    return !_var || is_empty(*_var);
+  } else if constexpr (internal::is_skip_v<Type>) {
+    return Type::skip_serialization_;
+  } else if constexpr (internal::has_reflection_type_v<Type>) {
+    if constexpr (internal::has_reflection_method_v<Type>) {
+      return is_empty(_var.reflection());
+    } else {
+      const auto& [r] = _var;
+      return is_empty(r);
+    }
+  } else if constexpr (internal::is_rename_v<Type>) {
+    return is_empty(_var.value());
+  } else if constexpr (is_map_like_v<Type> || is_vector_like_v<Type>) {
+    return _var.begin() == _var.end();
+  } else {
+    return !_var;
+  }
+}
+
+}  // namespace parsing
+}  // namespace rfl
+
+#endif