Add impermanence for ship of harkinian's files.

nix/steam_deck/configuration/roles/shipwright/default.nix

@@ -28,6 +28,15 @@
         ];
 
         # TODO perhaps install ~/.local/share/soh/shipofharkinian.json
+
+        home.persistence."/home/deck/.persist" = {
+          directories = [
+            {
+              directory = ".local/share/soh";
+              method = "symlink";
+            }
+          ];
+        };
       })
     ]
   );