Add Ruxu crossing scenario

data/campaign/campaign.json

@@ -218,6 +218,11 @@
       "id": "043_ruxu_river_line",
       "title": "Ruxu River Line",
       "path": "res://data/scenarios/043_ruxu_river_line.json"
+    },
+    {
+      "id": "044_ruxu_crossing",
+      "title": "Ruxu Crossing",
+      "path": "res://data/scenarios/044_ruxu_crossing.json"
     }
   ]
 }