add requirements.txt

requirements.txt

@@ -0,0 +1,8 @@
+deepagents>=0.6.3
+langchain>=1.0.0
+langchain-openai>=0.3.0
+langgraph>=0.2.0
+python-dotenv>=1.0.0
+httpx>=0.27.0
+markdownify>=0.13.0
+tavily-python>=0.3.0