Justice Antonin Scalia, dead now more than a decade, was a rare sage whose personality outran even his considerable jurisprudential achievement. James Rosen’s new volume, “Scalia: The Supreme Court Years, 1986—2001,” gives us the man in full: loud, learned, combative, and, I submit, essentially good.Heavyset and hilarious, Nino—his nickname—was Falstaff without the vices, shorn of Fat Jack’s cowardice and moral slipperiness, possessed instead of…