Added class DrivenEngine (no implementation yet)

luprex/core/cpp/util.hpp

@@ -21,6 +21,7 @@ enum WorldType {
 };
 
 using StringVec = std::vector<std::string>;
+using StringMap = std::map<std::string, std::string>;
 using HashValue = std::pair<uint64_t, uint64_t>;
 using IdVector = std::vector<int64_t>;