Add documentation for properties of a "Coding Train event"

[shiffman]

This should probably go in the guide!

  {
        "title": "Neuroevolution - the Nature of Code",
        "description": "Watch as Dan steps through each of these fun challenges, then put your new knowledge to work and create your own projects.",
        "date": "2022-07-16",
        "time": "20:00",
        "host": "dan Shiffman",
        "type": "Livestream",
        "url": "https://www.youtube.com/channel/UCvjgXvBlbQiydffZU7m1_aw"
  }

[M0nica]

I'd like to work on adding documentation to the guide for how to add upcoming Coding Train events.

[shiffman]

Thank you @M0nica!