Binder for play.api.routing.sird router

Example:

scala> import play.api.routing.sird._
scala> import play.api.routing._
scala> import play.api.mvc._

scala> sealed abstract class Greeting(val value: Int) extends IntEnumEntry

scala> object Greeting extends IntPlayEnum[Greeting] {
     |   val values = findValues
     |   case object Hello   extends Greeting(1)
     |   case object GoodBye extends Greeting(2)
     |   case object Hi      extends Greeting(3)
     |   case object Bye     extends Greeting(4)
     | }

scala> val router = Router.from {
     |   case GET(p"/hello/${Greeting.fromPath(greeting)}") => Action {
     |     Results.Ok(s"$greeting")
     |   }
     | }
scala> router.routes
res0: Router.Routes = <function1>