Add Liaoxi pursuit scenario

data/campaign/campaign.json

@@ -108,6 +108,11 @@
       "id": "021_bohai_remnants",
       "title": "Bohai Remnants",
       "path": "res://data/scenarios/021_bohai_remnants.json"
+    },
+    {
+      "id": "022_liaoxi_pursuit",
+      "title": "Liaoxi Pursuit",
+      "path": "res://data/scenarios/022_liaoxi_pursuit.json"
     }
   ]
 }