[Docs]: add component classNames hooks to official documentation #34815

Area

React Components (https://react.fluentui.dev)

What kind of documentation issue are you reporting?

• Reporting a typo
• Reporting a documentation bug
• Documentation improvement
• Documentation feedback

Is there a specific documentation page you are reporting?

every component page

Description

all v9 controls provide css classnames hooks as public api - example https://github.com/microsoft/fluentui/blob/master/packages/react-components/react-button/library/src/components/Button/useButtonStyles.styles.ts#L8-L11

these hooks are nowhere to find besides source code

This is a feature request to add new docs box that will document this public API.

Contrived Example:

Validations

• Check that there isn't already an issue that requests the same feature to avoid creating a duplicate.