Improve MSVC C++ modules compatibility for nlohmann_json

- Keep complete module interface with all exports
- Export all standard types: json, basic_json, adl_serializer, json_pointer, ordered_json, ordered_map
- Export detail namespace symbols for advanced usage
- Ensure compatibility with MSVC C++20/23 modules
- Maintain full functionality without breaking changes

Author: banderzhm

src/modules/json.cppm

@@ -12,3 +12,21 @@ export namespace nlohmann {
     using ::nlohmann::ordered_json;
     using ::nlohmann::ordered_map;
 }  // namespace nlohmann
+
+NLOHMANN_JSON_NAMESPACE_BEGIN
+
+namespace detail
+{
+    export using NLOHMANN_JSON_NAMESPACE::detail::json_sax_dom_callback_parser;
+    export using NLOHMANN_JSON_NAMESPACE::detail::unknown_size;
+} // namespace detail
+
+export using NLOHMANN_JSON_NAMESPACE::adl_serializer;
+export using NLOHMANN_JSON_NAMESPACE::basic_json;
+export using NLOHMANN_JSON_NAMESPACE::json;
+export using NLOHMANN_JSON_NAMESPACE::json_pointer;
+export using NLOHMANN_JSON_NAMESPACE::ordered_json;
+export using NLOHMANN_JSON_NAMESPACE::ordered_map;
+export using NLOHMANN_JSON_NAMESPACE::to_string;
+
+NLOHMANN_JSON_NAMESPACE_END