OSCAR LOPEZ  THE science-fiction franchise "Star Trek" is introducing its first transgender and non-binary characters, with both roles set to debut in its U.S. television series next month, producers said on Wednesday. The trans character named Gray will be played by trans actor Ian Alexander, the producers said, and non-binary Adira will be played by Blu del Barrio, an actor who like the character does not identify as male or female. They will appear in the third season of CBS Television's series "Star Trek: Discovery," the latest incarnation of the TV franchise that launched in 1966. "Star Trek" has spawned…