Lin-Manuel Miranda’s Tony-winning musical “Hamilton” set a new standard in so-called “colorblind” casting when it filled the roles of America’s Founding Fathers with black and Latino actors. But before that show took Broadway by storm, Miranda wrote “In the Heights,” which brought to life the upper Manhattan community of Washington Heights. As Theatrical Outfit’s production opens at the Rialto Center for the Arts in Atlanta on Thursday night, we talk to Julissa Sabino, one of the show’s stars,