This implements the control points API.

This jira ticket will be code reviewed in jira ticket WT-13570. That is the first ticket in which the framework is testable.

Note, the control points implementation tickets are in three time periods:

1. POC - Part of the POC.
2. MVP - Part of the minimal viable product. However, even the POC can be used, but less conveniently than the MVP.
3. Future - Enhancements after the MVP.

The title of each ticket starts with the time period.