post a meeting preview the day before a meeting on #general
Refer to issue #2 for the series of actions that will trigger this post.
Identify tomorrow's meeting by comparing today's date and the list of events on our Google Calendar, through the Calendar API.
Once an affirmative response has been received from #meeting-planning, through the Trello API, find a list on meeting planning board that has as its title the date of the meeting tomorrow. Iterate through the cards on that list, saving their names. Use that data to write and format a post for #general. Ping only @here. This post should say something along the lines of 'Hello, <!here>!. We have a meeting we're planning for you for tomorrow. Here's what we'll be covering:', with the saved Trello card titles listed below as bullet points. 'See you tomorrow in [location of the meeting] at [time of the meeting].'
An accompanying file should be written with a variety of phrasing that the bot can use to make this post feel more natural and less impersonal.