Description

Replaces withSelect references with useSelect hook in documentation.

PR also removes the "Finishing Touches" section from the "Creating a Sidebar for Your Plugin" tutorial since update examples don't require refactoring.

Fixes #33411.
Closes #33428.

How has this been tested?

I tested changes locally by creating a plugin for each example.

Types of changes

Documentation

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• I've tested my changes with keyboard and screen readers.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR (please manually search all *.native.js files for terms that need renaming or removal).