Maurizio Gucci, whose family name is still a synonym for style and chic, forfeited his pride, his reputation, and his global empire of bags and shoes before he lost his life to a mysterious, elegantly dressed assassin. From Maurizio's Bulgari-draped ex-wife, and from other family members, JUDY BACHRACH learns of the intense loathing and vicious rivalries that brought down the Gucci dynasty