Just in case you, or someone your boat, develop an insatiable desire to go shopping the next time you’re on a cruise, consider this: Carrefour, the huge French-based multinational retailer, is just opening a floating supermarket in Dubai. A company statement said the floating store, named Carrefour Bites and More By the Shore, is “aligned with our vision to create great moments for everyone, every day.” The store is on a custom-built Aqua Pod, and is designed to serve customers from megayachts, jet skis and even those on three nearby beaches. It will sell more than 300 products, including food,…