It takes almost no time at all when talking with Michael Chabon to realize that the Pulitzer Prize-winning author of “The Amazing Adventures of Kavalier & Clay” is a die-hard “Star Trek” fan. Given that he’s the showrunner of the latest “Trek” iteration, “Star Trek: Picard,” the 56-year-old has found it particularly satisfying to engage with the vast “Trek” fandom as the first season of “Picard” heads into its finale on Thursday.