Add requirements.txt for Render deployment

Author: raghavx03

requirements.txt

@@ -0,0 +1,12 @@
+fastapi[standard]>=0.115.11
+uvicorn>=0.34.0
+httpx>=0.25.0
+markdown-it-py>=3.0.0
+pydantic>=2.0.0
+python-dotenv>=1.0.0
+tiktoken>=0.7.0
+python-telegram-bot>=21.0
+discord.py>=2.0.0
+pydantic-settings>=2.12.0
+openai>=2.16.0
+loguru>=0.7.0