Hunter, a prolific Off Broadway playwright with an oeuvre of works set in Idaho (“A Case for the Existence of God,” “Grangeville”), is making his Broadway debut with “Little Bear Ridge Road,” which had its premiere last year at Steppenwolf Theater Company in Chicago. Its transfer declares the Broadway resurrection of the exiled-for-a-while producer Scott Rudin. (Allegations of bullying in 2021 led to widespread denunciations.) And honestly? Everything about this impeccable production, presented by Rudin and the media mogul Barry Diller, exudes the nearly flawless taste that Rudin is famous for.