Jeff Pate moved to the town of Nolensville about one year ago and says he promptly fell in love, except he found the town lacked a core — the kind of vibrant cluster of offices, restaurants, grocers, shopping and entertainment that would establish the town's identity. Pate is now pushing an ambitious $90 million plan to create a downtown for Nolensville, very likely the most extensive mixed-use development the town's ever witnessed.