Calendesk + Full Slate Integration

Keep Calendesk and Full Slate aligned: when scheduling events happen in one, update the other automatically.

Example: when Calendesk's "Watch Bookings" fires, WEXTL can "Accept a Class Event" in Full Slate. Calendesk has 8 triggers (including Watch Bookings, Watch Employees, and Watch Event); Full Slate has 45 actions (including Accept a Class Event, Accept an Appointment, and Add a Client to a Class).