[Feature] Divide shop earnings among shop staff/owners

[Bloodlex]

Describe the Feature:

We would like to give our players an opportunity to create shops with another player/players. Money would be divided evenly among other staff members, so every added player could get a share of shop earnings. It would be optional and could be turned on and off by a shop owner.

It could be also a separate feature other than staff command whatever is easier to implement.

Thank you very much.

[Ghost-chu]

https://github.com/Ghost-chu/QuickShop-Reremake/issues/578