Allow ordering of IConvertGameObjectToEntity behaviours.

I have a lot of IConvertGameObjectToEntity MonoBehaviour’s in my code and they are often order dependent. Could you add a custom attribute so that we could control the order that these conversion monobehaviours are called?

Ideally, we’d just use UpdateBefore and UpdateAfter like we do with systems.

AFAIK they are called in the order that they are currently in the inspector, but never really debugged to see if that’s the case