Copy page controllers from the ECA module

The core user module provides forms (Manage Permissions) that can be used by other modules. The user modules provides a Route Subscriber, and other modules declare that route provider in the attributes for their bundle entities. I think the same method will work here.

References:

• Drupal\user\Entity\EntityPermissionsRouteProvider
• Link Templates →

Let's start from the top: the list page that shows all the available config entities of a target module, e.g. /admin/workflow/eca for the ECA module. That list is probably ECA-specific, and the overview page(s) for migrate will be different? If so, that controller should be owned by the target module, not the API.