Transform enum values' names with a macro setting

[fehu]

Added a derivation setting for transforming GraphQL enum values, similar to TransformFieldNames.

Use case

Since graphql has no definition scopes, the following scala enums will cause collision:

sealed trait Color
object Color {
  case object Red extends Color
  case object Blue extends Color
  case object Green extends Color
  // etc
}

sealed trait TrafficLight
object TrafficLight {
  case object Red extends TrafficLight
  case object Yellow extends TrafficLight
  case object Green extends TrafficLight
}

The solution might be adding a prefix to graphql enum values, renaming, for example, traffic light colors to TrafficLightRed, TrafficLightYellow and TrafficLightGreen.

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The proposed setting should allow to do it in bulk.

[OlegIlyenko]

Thanks a lot for working this feature! 👍 At the first glance it looks good to me, but I would like to give it nor in-depth review soon.

the following scala enums will cause collision

I also wanted to mention that this scenario should work quite fine even without name transformation. Enum value names and type names do not collide with each other.

[fehu]

Thanks for the tip, I thought that enum names would collide. Anyway, this setting might be useful in some other case.