Discount Rules Ability to Match 'Not'

[TQ-Benji]

Is your feature request related to a problem? Please describe.
It would be great if we could apply discounts codes if a condition is not met. eg if member is not in "Staff" member group apply discount.

Describe the solution you'd like
Add match condition for 'Not' in discounts rules, this would return true if the condition is not met.

Describe alternatives you've considered
Tried to create this with match any of all other groups but then non members don't get the discount which in my use case we want them to be able to. Alternative solution could add option for Non Members in member groups rule

Thanks

[TQ-Benji]

I must be blind, https://vendr.net/docs/core/1-4-0/key-concepts/discount-rules-and-rewards/ found out I can make my own