refactor(controller): Update TrajectoryFollow method signature and improve path handling

- Changed the signature of TrajectoryFollow to accept a vector of unitree::robot::go2::PathPoint instead of std::array<float, 6>.
- Updated the implementation of TrajectoryFollow in controller.cpp to utilize the new path type.
- Removed unnecessary status message in CMakeLists.txt related to unitree_sdk2 detection.
- Added a new function in custom_robot.cpp to create example trajectories for different path types (line, square, circle) and integrated it into the command processing for TrajectoryFollow.

include/controller.hpp

@@ -60,7 +60,7 @@ public:
     bool FreeAvoid(bool flag);
     bool WalkUpright(bool flag);
     bool CrossStep(bool flag);
-    bool TrajectoryFollow(const std::vector<std::array<float, 6>>& path);
+    bool TrajectoryFollow(const std::vector<unitree::robot::go2::PathPoint>& path);
     
     // Obstacle 
     bool SwitchSet(bool enable);