add try_engine

bin/main.cpp

@@ -1,7 +1,7 @@
-#include "engine/engine.hpp"
+#include "rrr/rrr.hpp"
 
 auto main(int argc, char* args[]) -> int
 {
-  decltype(auto) app = tr::core::create_app();
+  decltype(auto) app = try_engine::create();
   app.run();
 }