OpenAPI / Schemas

[RadoRado]

It's a good idea to write a thing or two about OpenAPI schema & what are the options for doing this & supporting it:

• Using a built-in tool like https://drf-spectacular.readthedocs.io/en/latest/
• Doing it manually

This is rather an interesting topic about the Django Styleguide & perhaps not much to be added to the Django Styleguide Example project.