At the Broadhurst, the cats vogue. At the St. James, Céline Dion retells “Titanic.” At Studio 54, Frank-N-Furter returns. In Chelsea, a gay hockey romance is a filthy fan event. At the Lyceum, Mary Todd Lincoln keeps spiraling before packed houses. As Pride Month ends, it is worth taking stock of gay and queer theater in New York. Despite attacks on LGBTQ+ rights and drag performance, queer theatricality is not being pushed to the margins. It is…