From beyond the museum walls Monday, works of art will move and take shape as the glitterati of guests from Beyoncé, Nicole Kidman to Venus Williams will fashionably ascend the Metropolitan Museum of Art’s steps and exhibit their creative interpretations of this year’s dress code, “Fashion is art.” The question of whether fashion is art has long been topic of conversation for fashion insiders, and this first Monday in May the dress code is leaving nothing up for debate. The dress code for the