Rework the way ComponentType works

[denniskaselow]

The static fields in ComponentType are a recipe for disaster in testing. When creating a multitude of different components and tests executed later, with fewer different components, use _forComponentsOfEntity in ComponentManager then they will run into out of bounds exceptions when accessing components (as is already happening in coverage where 4b8a029 doesn't help because of parallel execution of tests).

Maybe make the indexBit-creation/management of the component type part of the world. That should also make if possible to have multiple worlds if that's needed at some point.