A woman suffered serious injuries on Thursday afternoon when she was struck by an idling truck with a manual transmission, State Police said. The woman partially entered the pickup truck, which was parked in her driveway, and started the engine. She then exited the vehicle and left it running while it was unoccupied. The truck then traveled forward and struck her, officials said. State troopers responded to the incident at a home in Wantage, Sussex County, at 2:01 p.m. The victim, a 38-year-old, was located on the scene and airlifted to a hospital for treatment of serious injuries, authorities…