added requirements.txt

requirements.txt

+annotated-types==0.6.0
+anyio==3.7.1
+click==8.1.7
+exceptiongroup==1.1.3
+fastapi==0.104.1
+h11==0.14.0
+idna==3.4
+pydantic==2.4.2
+pydantic_core==2.10.1
+sniffio==1.3.0
+starlette==0.27.0
+typing_extensions==4.8.0
+uvicorn==0.23.2