ruff fixes

bindings/python/tsid/__init__.py

demo/demo_quadruped.py

exercizes/ex_0_ur5_joint_space_control.py

exercizes/ex_2.py

exercizes/ex_3_biped_balance_with_gui.py

exercizes/ex_4_plan_LIPM_romeo.py

exercizes/plot_utils.py

exercizes/tsid_biped.py

exercizes/tsid_manipulator.py

exercizes/ur5_conf.py

exercizes/ur5_reaching_conf.py

tests/python/test_Constraint.py

tests/python/test_Contact.py

tests/python/test_ContactPoint.py

tests/python/test_Gravity.py

tests/python/test_Tasks.py