Update built-in Abstract classes to support being called via array

[alexstandiford]

It's possible to create a factory class instead of extending an abstract class when registering things. It would be nice if most of the current abstract classes had some way to construct inline with an array instead of always needing to create a class.

This would make it so that super simple registered items could be done quickly, and if it were ever necessary to turn it into a proper extended class, it could be done with minimal concerns for backcompat.