Add Weishui crossing scenario

data/campaign/campaign.json

@@ -178,6 +178,11 @@
       "id": "035_weishui_camps",
       "title": "Weishui Camps",
       "path": "res://data/scenarios/035_weishui_camps.json"
+    },
+    {
+      "id": "036_weishui_crossing",
+      "title": "Weishui Crossing",
+      "path": "res://data/scenarios/036_weishui_crossing.json"
     }
   ]
 }