OpenApi 3.0 support to allow ordering

[austek]

The current implementation, Swagger v2 support, allows to configure the order of the parameters, operations and definitions. Also, allows to group paths by tags.

Ideally, OpenApi 3.0 support #340 should be allow above customization too.

[BenjaminHetzjelli]

For what it's worth, I don't believe the swagger implementation of the OpenAPI 3.0 spec allows specifying ordering of fields. I have found that to be missing in my experience.

[SomeDeveloper13]

I would like to ... third this request.
It's extremely useful. Especially when you have DTO's & that have parent classes, or it only makes sense to enter data in one specific order for parameters.