Convert demo folder project to Python

[kinfey]

Convert the demo folder project from C# and .NET to Python.

• Controllers:

  • Add order_controller.py to handle order-related routes.
  • Add payment_controller.py to handle payment-related routes.
  • Add user_controller.py to handle user-related routes.

• Models:

  • Add order.py to define the Order model.
  • Add order_status.py to define the OrderStatus model.
  • Add payment.py to define the Payment model.
  • Add payment_status.py to define the PaymentStatus model.
  • Add user.py to define the User model.
  • Add user_login_request.py to define the UserLoginRequest model.
  • Add user_login_response.py to define the UserLoginResponse model.
  • Add user_profile.py to define the UserProfile model.
  • Add user_registration_request.py to define the UserRegistrationRequest model.
  • Add user_registration_response.py to define the UserRegistrationResponse model.

• Data Access:

  • Add db.py to set up SQLAlchemy database connection.
  • Add order_repository.py to handle order data access.
  • Add payment_repository.py to handle payment data access.
  • Add user_repository.py to handle user data access.

• Services:

  • Add order_service.py to handle order-related business logic.
  • Add payment_service.py to handle payment-related business logic.
  • Add user_service.py to handle user-related business logic.

• Application Setup:

  • Add app.py to set up the Flask application and register blueprints.

• Remove C# and .NET files:

  • Delete ChengFenStore.sln, ChengFenStore.csproj, and all C# files in Controllers, Data, Models, and Services directories.

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