Sonequa Martin-Green stars in the new dramedy ‘My Dead Friend Zoe’ alongside Natalie Morales, Morgan Freeman, and Ed Harris. She spoke with Bianca Piazza of MovieWeb about the film, its roots in the veteran community, its exploration of PTSD, and what she wants to do now that her big TV franchises (‘The Walking Dead’ and ‘Star Trek: Discovery’) have come to an end.