Holly Golightly does not. Go lightly, that is. The new stage adaptation of 'Breakfast at Tiffany's,' Truman Capote's beloved portrait of a glamorous waif in 1940s New York, moves with a distinctly leaden step, as if it dreaded what might be waiting around every dark corner of the sinister city it portrays....Mr. Greenberg's adaptation incorporates far more of Capote's words than the Edwards film did, with shimmering passages of reminiscence that come directly from the book. Yet no matter how finespun the original ingredients, this particular soufflé seems doomed never to rise.