Allow https://rewst.io to both read and manage scheduling.

Example use case is Rewst is running an automation that will require technician review. Instead of going to a dispatch team to schedule the ticket for review, use TimeZest to pick the soonest appointment slot based on the appointment and team type. The appointment is scheduled automatically by Rewst and the client notified via Rewst that the automation is done and a technician will review its work at the scheduled time provided by TimeZest.