COVINGTON, La. — Winn-Dixie’s chairman, president and CEO, Peter Lynch, calls them “state of the art.” The company’s VP pharmacy, John Fegan, calls them “transformational.” They’re talking about the Jacksonville, Fla.-based supermarket chain’s glitzy new prototype store, an upscale and eye-popping showcase for everything from locally sourced foods to gluten-free and specialized dietary offerings.