feat: 添加项目文档和配置更新

docs: 完善README文档结构和内容
refactor: 更新配置类注释和文档字符串
style: 统一代码格式和命名规范
fix: 修正MCP服务器配置和依赖项

scripts/make_rag_database.py

@@ -4,10 +4,10 @@ import os
 
 from lang_agent.rag.emb import QwenEmbeddings
 
-from langchain.text_splitter import CharacterTextSplitter
+from langchain_text_splitters import CharacterTextSplitter
 from langchain_community.vectorstores import FAISS
 from langchain_openai import OpenAIEmbeddings
-from langchain.schema import Document
+from langchain_core.documents import Document
 
 def main(save_path = "assets/xiaozhan_emb"):
     cat_f = "assets/xiaozhan_data/catering_end_category.csv"