Proposal: optional labels for enums

[aidalgol]

Is your proposal related to a problem? Please describe.
AshPyro.Enum looks ideal for my in-progress Phoenix app using Ash for resources, but one of my enum-type attributes represents New Zealand districts, the names of some of which are hyphenated, so the opinionated "humanized" labels will be incorrect.

Describe the solution you'd like
An optional syntax for providing a label for an enum value that would be used by humanize_enum/1, if provided, otherwise the current behaviour would be used.

Describe alternatives you've considered
Just using Ash.Type.Enum with functions on my enum module for now.

Express the proposal either with a change to resource syntax, or with a change to the pyro interface
Possible syntax suggested by @frankdugan3 on the Ash Discord server:

use AshPyro.Enum, values: [some_district: [label: "Some-District"]]

Additional context
Official New Zealand district names and maps

[frankdugan3]

I will eventually add this feature, along with better docs & testing. If I take too long to get around to it and you want to take a stab at a PR, feel free to give it a try!