Add ROS2 package `low_cost_robot_description` for follower arm URDF

[tc-huang]

Hello Alexander,

Thank you for sharing this great project. I had a wonderful time building my own robotic arm.

Description

This PR adds the low_cost_robot_description package, a ROS2 package containing the URDF for the follower arm.

I created the low_cost_robot v1.f3d file based on arm.step and then used fusion2urdf-ros2 to generate the files in the low_cost_robot_description package, referring to the video tutorial: ArmBot Fusion360 to URDF in ROS2 | Part 1.

Motivation

The motivation for this PR stems from the frequent need for URDF files when developing ROS programs or using other simulation software. Additionally, issue #32 highlighted the demand for URDF files. I believe this PR will enable more users to explore and innovate with the robotic arm in diverse ways.

Changes

• Added the low_cost_robot_description package to the ros2_ws workspace.
• Included URDF files for the follower arm located at ros2_ws/src/low_cost_robot_description/urdf/low_cost_robot.urdf.
• Added the README.md to include usage instructions and setup steps for the low_cost_robot_description package and the ros2_ws workspace.

Screenshots

Usage Example 1: Follower Arm in RViz

Usage Example 2: Follower Arm in Gazebo

[MichaelrMentele]

This is very cool, thank you for sharing.