Add docstring examples for Scalar regex, crypto, struct and other (#1422)

* Add docstring examples for Scalar regex, crypto, struct and other functions

Add example usage to docstrings for Scalar regex, crypto, struct and other functions to improve documentation.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* Fix typo

* Fix docstring already broken that I added an example to

* Add sha outputs

* clarify struct results

* Examples should follow google docstyle

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Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: ntjohnson1