Structured architecture for 仪表盘 with Auth and CRUD

[Shreyash0895]

Resolves #76 - Added architectural guidelines and framework recommendations for building a Python dashboard with Auth and CRUD

[Shreyash0895]

I have created a dedicated folder with a production-ready Python backend structure using modern standards.
-main.py: A FastAPI application with JWT-protected routes and CRUD endpoints.
-models.py & database.py: SQLAlchemy ORM setup utilizing SQLite for easy initial deployment.
-schemas.py: Pydantic models to handle request validation and response serialization.
-auth.py: Password hashing (bcrypt) and JWT access token generation.
-requirements.txt: Includes fastapi, uvicorn, sqlalchemy, passlib, and python-jose.