Silver racks filled with dozens of cooked turkeys lined the floor of a kitchen inside the Atlantic City Convention Center as scores of volunteers in aprons scurried around slicing ham and stirring vats of broth. It’s two days before Thanksgiving, and casino chefs from across the city have teamed up to prep more than 2,500 meals for hundreds of the city’s homeless and needy for the fifth year in a row. For Chef George Fisher, the event is personal. Five years ago, he toured the Atlantic City Rescue Mission shelter on Bacharach Boulevard and saw up close the need to feed.