It’s genuinely nice to encounter a gentle, moving film centered on family that doesn't feel cloyingly sentimental and overly sweet. That’s exactly what writer-directors Rachael Moriarity and Peter Murphy have created with their newest movie, a kind, affectionate story about an Irish woman, Róise (played by Bríd Ní Neachtain), who is deeply grieving and isolated until a strange dog appears and she believes he might be…