Improve launch files and 1dof simulation

...wa_bringup/launch/__pycache__/iiwa.launch.cpython-310.pyc

...wa/iiwa_description/config/initial_positions_IRS_Lab.yaml

...matics/iiwa_inverse_kinematics/inverse_kinematics_node.py

...ple_robot_1dof/launch/kuka_rviz_simulation_1dof_launch.py

...ot_1dof/simple_robot_1dof/forward_kinematics_node_1dof.py

...imple_robot_1dof/simple_robot_1dof/reference_node_1dof.py