chore: rename multiple files to improve importability and module structure

01_agent_introduction/agent-demo.py

@@ -1,15 +0,0 @@
-# 让ai说一句话
-from config import OPENAI_API_KEY
-from langchain_openai import ChatOpenAI
-
-# 配置deepseek
-llm = ChatOpenAI(
-    model="deepseek-chat",
-    api_key=OPENAI_API_KEY,
-    # 注:在.env里把OPENAI_API_KEY改成你自己的api-key即可
-    base_url="https://api.deepseek.com"
-)
-
-# 调用模型
-response = llm.invoke("你好呀")
-print(response.content)