[Accessibility Docs] Chips

Using [this template](https://docs.google.com/document/d/1IwFMfJrTfJPXDcVJfLWXYkw-pjgWhBWo4GX8X098Q64/edit#), create accessibility docs for [Chips](https://vanillframework.io/docs/patterns/chip)

Start with the linked accessibility documentation template and the Chips pattern page. Create accessibility documentation for Chips following the template; done means the requested Chips documentation is complete and follows that structure.

Written by the indexing model from the issue text.