[Document] joypad <--> robot control keymapping

[kvnptl]

• Create a document for controlling the robot (base+arm) with the joypad

[sthoduka]

something like this? https://github.com/b-it-bots/mas_industrial_robotics/blob/noetic/mir_command_tools/mir_teleop/ros/doc/youbot_joypad_description.pdf

[kvnptl]

something like this? https://github.com/b-it-bots/mas_industrial_robotics/blob/noetic/mir_command_tools/mir_teleop/ros/doc/youbot_joypad_description.pdf

This document is partially correct; we need to modify the document based on the current configuration. Arm control needs to be added.