Add orjson library to serialization section

Author: JinyangWang27

README.md

@@ -932,6 +932,7 @@ _Libraries and software for indexing and performing search queries on data._
 _Libraries for serializing complex data types._
 
 - [marshmallow](https://github.com/marshmallow-code/marshmallow) - A lightweight library for converting complex objects to and from simple Python datatypes.
+- [orjson](https://github.com/ijl/orjson) - Fast, correct JSON library.
 - [pysimdjson](https://github.com/TkTech/pysimdjson) - A Python bindings for [simdjson](https://github.com/lemire/simdjson).
 - [python-rapidjson](https://github.com/python-rapidjson/python-rapidjson) - A Python wrapper around [RapidJSON](https://github.com/Tencent/rapidjson).
 - [toonify](https://github.com/ScrapeGraphAI/toonify) - A compact, human-readable serialization format that reduces LLM token usage by 30-60% compared to JSON.