Pg order by plugin apply scope

[hos]

Description

Add a test for addPgTableOrderBy using scope. And also example code in the docs.

Performance impact

Security impact

Checklist

• My code matches the project's code style and yarn lint:fix passes.
• I've added tests for the new feature, and yarn test passes.
• I have detailed the new feature in the relevant documentation.
• I have added this feature to 'Pending' in the RELEASE_NOTES.md file (if one exists).
• If this is a breaking change I've explained why.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 5fb5eb8

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[benjie]

Thanks!

[benjie]

No changeset needed since this only changes tests/docs.