Added missing cartesian_state include to franky.hpp

Author: TimSchneider42

include/franky.hpp

@@ -23,6 +23,7 @@
 #include "franky/path/time_parametrization.hpp"
 #include "franky/path/trajectory.hpp"
 
+#include "franky/cartesian_state.hpp"
 #include "franky/control_signal_type.hpp"
 #include "franky/gripper.hpp"
 #include "franky/kinematics.hpp"