Add description to events

[smncd]

The events page in Rallly is a really nice way to see upcoming, well, events, and I think it'd be even better if each event could have a description.

My suggestion here would be to, upon poll finalization and the creation of the event, carry over the poll description to the event.

A 2-second mockup:

Since descriptions can be long and we don't want a single event to take up the whole viewport, the description could also be hidden initially/put in a accordion.

If this sounds interesting, I'm happy to dig into this with some more detailed mockups and also work on implementation.

Cheers!