Then and now, Chicago was “a town where people did stuff.” It got things done, stirred up trouble, made no little plans. That, says one of the underground abortion providers interviewed in the distressingly pertinent new documentary “The Janes,” premiering Wednesday, was the “beauty” of the place. The word “beauty” sounds jarring in this context, and the movie knows it. “The Janes” directors Tia Lessin and Emma Pildes are well aware of how documentaries about our recent past have a way of anticipating our near future. In 2022, a majority of U.S. citizens still support abortion rights. But with…