Wal-Mart Stores Inc. is planning to open its first supercenter, a store with a full supermarket, in North Jersey at the former APA Transport Corp. site in North Bergen, a company spokesman confirmed Monday. The news means North Jersey’s regional supermarket chains — Pathmark, ShopRite and A&P; — could have a food fight on their hands, as the nation’s largest retailer tests the waters with one of its discount supermarkets. The store would be Wal-Mart’s third supercenter in New Jersey, and the closest to New York City. Read more of this story…