Implement placeholder/stub routes/handlers for Core API REST endpoints.
The following tasks define various endpoints to be implemented:
All of these require modifications to coreRoutes.json, and some are likely to share handler classes. Determine which will share handlers, add the routes to coreRoutes.json, and implement bare stub handlers. It is not necessary for the stub handlers to return proper dummy data or headers - that can be handled under the individual tasks. The purpose here is to implement that groundwork and avoid merge conflicts among al the various tasks that touch coreRoutes.json and which will likely go through code review simultaneously.