made some imports optional for easier install for the wara manipulation challenge

Dockerfile_challenge

TODOS

python/examples/casadi_ocp_collision_avoidance.py

python/examples/comparing_logs_example.py

python/examples/crocoddyl_mpc.py

python/examples/crocoddyl_ocp_clik.py

python/examples/drawing_from_input_drawing.py

python/examples/joint_trajectory.csv

python/examples/path_following_mpc.py

python/examples/path_in_pixels.csv

...on/ur_simple_control/__pycache__/managers.cpython-312.pyc

python/ur_simple_control/clik/clik.py

python/ur_simple_control/managers.py

python/ur_simple_control/optimal_control/__init__.py

...le_control/optimal_control/create_pinocchio_casadi_ocp.py

python/ur_simple_control/optimal_control/crocoddyl_mpc.py

...mple_control/optimal_control/crocoddyl_optimal_control.py

...e_control/visualize/__pycache__/visualize.cpython-312.pyc

...le_control/visualize/manipulator_comparison_visualizer.py

python/ur_simple_control/visualize/visualize.py