chore(docs): update subquery documentation with more information (#10361

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* chore(docs): update subquery documentation with more details and examples

* chore(docs): ran prettier on content updates

* Apply suggestions from code review

Co-authored-by: Andrew Lamb <andrew@nerdnetworks.org>

* chore(docs): address PR feedback for subqueries

* chore(docs): updated subquery doc formatting and style

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Co-authored-by: Andrew Lamb <andrew@nerdnetworks.org>