Completed issue 71 and allowed village pages to be placed in illegal biomes adding +100 instability

src/main/resources/rivencraft.mixins.json

@@ -4,7 +4,9 @@
   "package": "net.dnorberg.rivencraft.mixin",
   "compatibilityLevel": "JAVA_21",
   "mixins": [
-    "AgeDungeonPlacementMixin"
+    "AgeDungeonPlacementMixin",
+    "AgeStructureBiomeMixin",
+    "StructurePlacementAccessor"
   ],
   "client": [
     "client.ClientLevelSoundMixin",