Improve CollectionConfig typings

[iway1]

The current CollectionConfig type offers very little type safety.

It could easily be changed to take a type parameter which should be passed the generated type for the collection and apply it to all access control at least, maybe hooks, etc in the config which would improve developer experienc while reducing potential for bugs created by passing incorrect types.

Also, it is not clear what the types represent, because they have single letter names. There is no reason a type parameter should not have a descriptive name so that they can be read by humans