Adds a new meteor toy to arcade machines

Inspired by https://github.com/d3athrow/vgstation13/pull/778 but implemented in a way that is in my opinion a bit more fun. The Mini-Meteor™ when thrown will make the meteor impact sound and camera shake that are the hallmark of everybody's favourite event, meteor showers. Obviously to prevent this from being spammed it's deleted upon use.

I also changed the AI toy's weight class to 2 because I always try to put them in my pocket and then get annoyed when I can't.