New artificial intelligence tools from Google and Microsoft give answers to search queries in full paragraphs rather than a list of links. Many publishers worry that far fewer people will click through to news sites as a result, shrinking traffic — and, by extension, revenue. “You could essentially call this the Wikipedia-ization of a lot of information,” said Bryan Goldberg, the chief executive of BDG, which publishes lifestyle and culture websites like Bustle, Nylon and Romper.