refactor(controller): Remove unused motion control methods and update CMake configuration

- Removed several unused methods from the Controller class, including HandStand, ClassicWalk, AutoRecoverSet, StaticWalk, TrotRun, EconomicGait, and SwitchAvoidMode.
- Updated CMakeLists.txt to remove the hardcoded include path for unitree SDK, streamlining the include directories for the main target.

include/controller.hpp

@@ -54,19 +54,12 @@ public:
     bool Dance2();
     bool LeftFlip();
     bool BackFlip();
-    bool HandStand(bool flag);
     bool FreeWalk();
     bool FreeBound(bool flag);
     bool FreeJump(bool flag);
     bool FreeAvoid(bool flag);
-    bool ClassicWalk(bool flag);
     bool WalkUpright(bool flag);
     bool CrossStep(bool flag);
-    bool AutoRecoverSet(bool flag);
-    bool StaticWalk();
-    bool TrotRun();
-    bool EconomicGait();
-    bool SwitchAvoidMode();
     bool TrajectoryFollow(const std::vector<std::array<float, 6>>& path);
     bool FootRaiseHeight(float height);