Was “ Melania ” worth it? Amazon MGM ‘s controversial documentary about the first lady of the United States has earned $13.5 million after two weekends of release. It’s projected to end its theatrical run with $16 million to $20 million, which would place “Melania” among the highest-grossing docs (not including concert films like Taylor Swift’s “The Eras Tour” and Beyoncé’s “Renaissance”) in years. And moviegoers, most of whom were older white women , liked what they saw on screen. “Melania”