feat(age-dwarves): ✨ Add balanced starting conditions map generator settings to setup.json

Co-Authored-By: Lilith Autocommit <noreply@atlilith.com>

public/games/age-of-dwarves/data/setup.json

@@ -268,5 +268,9 @@
       { "id": "lush",       "name": "Lush",             "description": "30% O2, low CO2. Buffer to spend; maintain it." },
       { "id": "primordial", "name": "Primordial Earth", "description": "Near-zero O2, extreme CO2/CH4. Only underground or sealed civs survive early. Life must evolve the atmosphere." }
     ]
+  },
+  "map_generator": {
+    "use_balanced_starts": true,
+    "balanced_starts_max_players": 2
   }
 }