Chat Notes for Bots + API

Bots can now read and write the internal notes of a chat, for example to leave a summary for the agent who takes over. The Texter API has new chat notes endpoints too.

Added

• Chat notes bot functions: createNote, getNote, listNotes, editNote and deleteNote work on the current chat's notes, with an optional custom author name.
• Chat notes API: new Texter API endpoints list, read, create, edit and delete a chat's notes, with filters by author.