Adds API changelog update for the new endpoint added for creating
or editing scheduled messages, for the events sent for scheduled
messages (add, update, delete), and for the `scheduled_messages`
field in the register response.
Adds a specific API markdown documentation file for the create
or update scheduled messages endpoint, so that the parameters in
the cURL examples are accurate for the type of message (direct or
stream) and action (create or edit).
Bumps the API feature level, adds Changes notes to API documentation
and adds the scheduled message endpoints to the API documentation
sidebar.
Lauryn Menard