add declaration

Author: kenoi1

src/robot/gym_vis/include/gym_vis.hpp

@@ -17,4 +17,10 @@
 #include <tf2_ros/buffer.h>
 #include <tf2_ros/transform_listener.h>
 
+class GymVis : public rclcpp::Node {
+public:
+    GymVis() : Node("gym_vis") {}
+};
+
+
 #endif