Make components Objects-of-Arrays (like BitECS)

[minecrawler]

This should be transparent, so that the current API does not change - ideally. Also, a way to provide explicit types should be provided, so more optimal storage types can be used.

The translation from array-of-objects components to objects-of-arrays can happen on maintain(). Query caches should still remain an array-of-objects, though, because that's how they are used.

[minecrawler]

Scratched, but maintain is removed for good