Create requirements.txt

requirements.txt

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+langchain>=0.1.0
+langchain-google-genai>=0.0.5
+google-generativeai>=0.3.0
+langchain-community>=0.0.16
+faiss-cpu>=1.7.4
+pypdf>=3.17.0
+sentence-transformers>=2.5.0
+pydantic>=2.5.0
+requests>=2.31.0
+huggingface-hub>=0.20.0
+fastapi>=0.101.0
+uvicorn>=0.23.0
+pydantic>=2.0.0
+python-dotenv>=1.0.0
+httpx>=0.24.1
+python-multipart>=0.0.6