Content Management API endpoint to retrieve content structure

Description

Content Management API has a new endpoint to retrieve content structure.

Avoid modifying or changing these APIs, as modifications may break the Structured Content integration with Welcome and negatively impact users.

Note: The Structured Content integration with Welcome relies on your installation of the Content Management API and Content Definitions API on the CMS side and that you haven't configured or customized these APIs. The Content Management API shares configuration and services with the Content Delivery API, so please carefully consider how you configure or customize the Content Delivery API.