Supports cloning battles for AI purposes.

src/Battling/Battle/Battle.hpp

@@ -36,6 +36,8 @@ namespace PkmnLib::Battling {
             scripts.Append(CreatureLib::Battling::ScriptWrapper(
                 CreatureLib::Battling::ScriptWrapper::FromScript(&_weatherScript)));
         }
+
+        Battle* Clone() const override;
     };
 }