If you were dying, how would you handle an apocalypse? What would motivate you? How would you react to a surprise global catastrophe unfolding around you? Those are the initial questions asked by Michael Sarnoski’s “A Quiet Place: Day One,” an unexpectedly moving prequel to John Krasinski’s pair of genre-twisting thrillers that began with 2018’s “A Quiet Place.” And before you yell “Spoiler!” we’re sad to say the first scene in the movie takes place in a hospice where we meet our unconventional heroine, Sam (Lupita Nyong’o).