[OUDS] Rename documentation page to plural if it contains a group

[MaxLardenois]

Prerequisites

• I have searched for duplicate or closed feature requests
• I have read the contributing guidelines

Proposal

Should be plural

• Tags
• Chips
• Badges

Should not be plural

• Link (will be a group when Expand link is implemented)
• Button (will be a group with Pagination button and Expand button)

Filenames should also reflect this.

Motivation and context

To implement the decided nomenclature and avoid title clash inside pages.

[vprothais]

We decided together that, since button and link will be groups in the future, there is no need to remove the s, to re-add it later. So I close this issue, since other components are done.