www/py-django-ninja: Add py-django-ninja 1.7.0

Django Ninja is a web framework for building APIs with Django and Python type
hints.

Key features:

• Easy: Designed to be easy to use and intuitive.
• FAST execution: Very high performance thanks to Pydantic and async support.
• Fast to code: Type hints and automatic docs lets you focus only on business logic.
• Standards-based: Based on the open standards for APIs: OpenAPI (previously known as Swagger) and JSON Schema.
• Django friendly: (obviously) has good integration with the Django core and ORM.
• Production ready: Used by multiple companies on live projects.