Add exponent option to number providers

The previous snapshot as of writing this (26.3 snapshot-9) added 4 new operations to number providers, that allowed for multiplication, min, max and average calculations. But there's one arithmetic operation still missing: division. That's why an exponent option could solve this issue: `x * y^(-1) = x / y`. This would be expressible via number providers. Something similar is done with subtraction, where `x *+ (y * -1) = x- y`

It's syntax would be like the `sum`, `product` and other operations of its kind, where it could take a list, constant, or other number provider; inline or referenced.

Allowing exponents would simultaneously allow for roots as well; for example `x^0.5 = √x`.

I'm requesting this change because of the new addition from 26.3 Snapshot 10: the `compute` command and the change to the `data` command that support it. The possibilities would be endless, if they aren't already so.