Utilization of quick.primitives in place of numpy arrays

[ACE07-Sev]

Greetings there,

Hope all are well. So, I have been thinking about this for quite a while, and would like to know what you (the users) think. At the moment, quick mix and matches use of primitives and numpy arrays based on convenience, which whilst making life a bit easier does create inconsistencies with respect to parameter types and returns for data such as statevectors and operators.

Goal of this discussion is to speculate whether quick should solely use primitives with flexible support of numpy arrays, or the current state is optimal.