EDITOR’S NOTE: Curio is a CNN Style series spotlighting small objects and the big ideas behind them. Taipei, Taiwan  —  The Louvre’s “Mona Lisa,” the British Museum’s Rosetta Stone, MoMA’s “Starry Night” — major museums often have one must-see item that singlehandedly draws visitors from around the world. For the National Palace Museum, in Taiwan’s capital Taipei, the star attraction is somewhat humbler: a cabbage. Carved from a block of white and green jadeite, the remarkably realistic