Add a Learning Path for teaching an SO-101 robot arm a pick-and-place task

[mitsunami]

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What this PR adds

This Learning Path shows developers how to:

• Connect and calibrate an SO-101 robot arm and two cameras.
• Record examples of a pick-and-place task with Hugging Face's LeRobot library.
• Use those examples to train SmolVLA, a visual-language-action model from Hugging Face.
• Run the trained model on the robot and evaluate the results.
• These workflow is executed on DGX Spark

Unlike most software-only Learning Paths, completing this tutorial requires physical robot hardware.

This PR also removes a duplicate name from assets/contributors.csv.

I would appreciate a review.