NEW YORK — Donald Trump Jr.’s wife took legal steps on Thursday to formally end their 12-year marriage, and the couple issued a statement saying they’re going their separate ways but “will always have tremendous respect for each other and our families.” Vanessa Trump, a former model, listed the breakup as “uncontested” in a state Supreme Court divorce complaint filing that is secret except for the title of the case. The Trumps, both 40, were married in 2005 and have five children.