[DNR] Test for first pr.

[KIRITOLTR]

Description

Adding some simple examples for functions in aggregate.rst.

Motivation and Context

For addressing the lack of working examples in functions docs. See #19830

Impact

Documentation.

Test Plan

Local doc builds. Some Screeshot:

Contributor checklist

• Please make sure your submission complies with our contributing guide, in particular code style and commit standards.
• PR description addresses the issue accurately and concisely. If the change is non-trivial, a GitHub Issue is referenced.
• Documented new properties (with its default value), SQL syntax, functions, or other functionality.
• If release notes are required, they follow the release notes guidelines.
• Adequate tests were added if applicable.
• CI passed.

== NO RELEASE NOTE ==

[linux-foundation-easycla]

• ✅login: KIRITOLTR / (85faee4)
• ✅login: KIRITOLTR / (85faee4, 952dcad)

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[KIRITOLTR]

Hi, @steveburnett. Seems like there is a building problem in presto-docs module. How to solve this check failure for now? Referrence here #25178.

[steveburnett]

Hi, @steveburnett. Seems like there is a building problem in presto-docs module. How to solve this check failure for now? Referrence here #25178.

Fix has been merged, and the test is now passing - see #25188 for an example. Rebase your PR to re-run the CI tests and docs / test (:presto-docs) (pull_request) should pass for this PR as well.