feat: Add dict to nativeEnum type

[hufftheweevil]

Great simple library!

Any interest in adding a dict property to nativeEnum types?

[StefanTerdell]

It's not a bad idea, but I'd like non-standard keywords to be opt-in, like with markdownDescription. I believe AJV will throw an error unless configured to allow them for example. A more descriptive prop name would probably be preferable as well.

Also include a mention in the readme. It's fine if it's just in the options table.

Add a couple of tests while you're at it.

[hufftheweevil]

Any suggestions for a more descriptive prop? dictionary lookup lookupMap?

[StefanTerdell]

enumMap perhaps?

I was thinking though, maybe it's enough to just include the keys? Like

return {
  ...
  enum: ...,
  enumKeys: actualKeys
}

They should be in the same order making it possible to construct it on the other end.

Object.fromEntries(schema.enum((value, index) => [schema.enumKeys[index], value]))