Patrick Stewart, who was set to return to the role of Jean-Luc Picard for the first time since 2002 for CBS All Access, in New York, Oct. 5, 2019. Stewart’s Picard represented a divergence from the “Star Trek” franchise’s signature hero, William Shatner’s James T. Kirk, and most other science fiction protagonists. (Mark Sommerfeld/The New York Times) By SOPAN DEB When Patrick Stewart, who died on Wednesday, was first offered the role of Jean-Luc Picard in “Star Trek: The Next Generation,” it…