Rena Cherry Brown, Jennifer Mendenhall, and Nanna Ingvarsson in Solas Nua’s production of Marina Carr’s “Woman and Scarecrow.” “The whole point of living is preparing to die,” says one character at a pivotal moment in Solas Nua’s new production of Woman and Scarecrow. It’s not just the point of life, but the point of the play itself, most of which is spent inside the mind of an unnamed woman as she spends her final…