KANSAS CITY, Mo. — Yankees manager Aaron Boone watched the hits begin to pile up on the massive, crown-shaped scoreboard beyond the centerfield wall at Kauffman Stadium, and he knew that his team was doing something impressive against the Kansas City Royals.He didn’t know until afterward that it was something historic.Yes, there were six home runs, including two from Amed Rosario. And the Yankees put up 24 hits in the 15-1 romp, their most since a game against Baltimore in July 2011. But what set the performance apart from all others Tuesday night — including all those games played by Lou Gehrig and Babe Ruth, Joe DiMaggio and Mickey Mantle — was this simple fact: For the first time in their storied history, the Yankees got at least two hits from every single player in their starting lineup.“I did see all the hits on the board,” Boone said afterward, “and I was like, ‘Man, you don’t see that very often.’”The Yankees had the benefit of facing the Royals on a designated bullpen day. Struggling reliever Bailey Falter was first on the mound, and he allowed as many hits (seven) as he record outs. Luinder Avila wasn’t a whole lot better when he replaced him.The last of the hits came against outfielder Tyler Tolbert, who threw a steady diet of 44 mph pitches to get through the ninth inning.Yet that doesn’t take away from one of the impressive hitting performances in Yankees history. Their hit total tied for their eighth-most ever, and the 24 hits were their most in a road game since Aug. 31, 1974, in a game against the White Sox. The six homers were the most by a team in the majors this season.“The performance they p …