HIGH POINT, N.C. — On a recent evening,the Rockers were getting ready for a professional baseball game at BB&T Point, the new multipurpose stadium in High Point, a small city about 90 miles west of Raleigh. On a bulldozed lot just behind the giant scoreboard, a developer was preparing to break ground for a condominium. And beyond the condo site, an old brick textile mill will soon be turned into a hub for furniture makers and design professionals. Also in the offing: an office and retail building, a hotel,