NorthPoint Development has proposed a 196 luxury apartment project on a 21-acre site in Liberty, and it promises to be the firm’s greenest project yet. Sitting across six buildings at Highway 291 and Forest Ave., the project would be 67 percent green space – 7 percent higher than any other NorthPoint project. A conservation easement also would be placed over an 8-acre wooded area that buffers the project from the surrounding single-family homes…