(Edit) Extend form fields

The core data must be added to the header of the details page.

ACTION DE1: Extend schemas inside OpenAPI

Adapt in File: <feature>-bff.yaml

Similar to the create-update generation, you can adapt the schema for update requests, see Extend form fields.

For the details page, the generator also creates 2 actions for the header by default. Consider adding custom actions to be available in the header via headerActions$ property. Please, reference the PageHeader docs for more information on the Action usage.

Remove the "ACTION" comment after working on this task