Create a separate 'kuka_inverse_kinematics' package

ros2_ws/src/kuka_inverse_kinematics/LICENSE

...ka_inverse_kinematics/kuka_inverse_kinematics/__init__.py

ros2_ws/src/kuka_inverse_kinematics/package.xml

.../kuka_inverse_kinematics/resource/kuka_inverse_kinematics

ros2_ws/src/kuka_inverse_kinematics/setup.cfg

ros2_ws/src/kuka_inverse_kinematics/setup.py

ros2_ws/src/kuka_inverse_kinematics/test/test_copyright.py

ros2_ws/src/kuka_inverse_kinematics/test/test_flake8.py

ros2_ws/src/kuka_inverse_kinematics/test/test_pep257.py