'core' app should not depend on apps that depend themselves on core (circular dependency

[jcbalmeida]

https://github.com/Ilhasoft/weni-marketplace-engine/blob/e1791d7fb6642eae66fc4527154b55c2a43f0452/marketplace/core/types/base.py#L6-L7

These imports does not break the application, but this type of circular dependencies can lead to high dificulty to maintain and improve the project in the future.

The correct thing would be for the other apps to register themselves in AppType when initializing (in AppConfig.init())