MILAN Fendi celebrated 100 years with a mega runway show on Feb. 26 that highlighted the Roman fashion house’s roots as a maker of luxurious fur stoles that grew into a touchstone of Italian craftsmanship under the creative direction of the late Karl Lagerfeld and Silvia Venturini Fendi. A fifth generation of the Fendi family — 7-year-old twins Dardo and Tarzio Delettrez Fendi — opened huge wooden doors on the new lush and expanded Fendi showroom to signal the start of the centenary show,