“Every Day in Kaimukī,” which is having its world premiere at Sundance, is one of those low-key gems that are wonderful to discover at a festival. It is a small, slice-of-life debut film co-written and directed by Alika Tengan, and featuring a charismatic performance by co-writer Naz Kawakami, playing a version of himself. Set and shot in Honolulu during the pandemic (but...