Macro impl_field_schema 

macro_rules! impl_field_schema {
    ($ty:ty) => { ... };
}

Implements FieldSchema for types that already have PartialSchema.

Users call this for their own types that derive ToSchema:

#[derive(utoipa::ToSchema)]
enum TicketStatus { Open, Closed }
cinderblock_json_api::impl_field_schema!(TicketStatus);