docs: add github star history

Author: RMA-MUN

README.md

@@ -382,3 +382,12 @@ separators: ["\n\n", "\n", "。", "！", "？", "!", "?", " ", ""]
 
 - Email: n3032747608@163.com
 - QQ: 3032747608
+
+## Star History
+
+
+ <picture>
+   <source media="(prefers-color-scheme: dark)" srcset="https://api.star-history.com/chart?repos=RMA-MUN/LangChain-RAG-FastAPI-Service&type=date&theme=dark&legend=top-left" />
+   <source media="(prefers-color-scheme: light)" srcset="https://api.star-history.com/chart?repos=RMA-MUN/LangChain-RAG-FastAPI-Service&type=date&legend=top-left" />
+   <img alt="Star History Chart" src="https://api.star-history.com/chart?repos=RMA-MUN/LangChain-RAG-FastAPI-Service&type=date&legend=top-left" />
+ </picture>