Add one example to learn beam by doing (#25719)

* Add one example to learn beam by doing

* add license

* clear the output

* Polished the notebook based on the comments

* cleared out the output

* Changed the answer views

* Update some cells

* Polished the words

* Update examples/notebooks/get-started/learn_beam_basics_by_doing.ipynb

Co-authored-by: tvalentyn <[email protected]>

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Co-authored-by: xqhu <[email protected]>
Co-authored-by: tvalentyn <[email protected]>