Highlight with badges new and recently updated documentation pages

Hello tanstack staff

I want to add a small request that i believe it will be for the benefit of everyone.

I saw in tanstack ai documentation form tanstack website, that the titles of guide sections have a badge "new" attached to them in sidebar nav which is awesome! It helps me understand whats going on more easly and keep myself updated with the doc.

The problem is that this pattern isnt followed for other libraires.

For instance ts query prefetch topic was updated, but bcs it doesnt have the badge "new/update" I didnt even know about it. Luckly i found because I checked github.

So it would be awesome if you add this when you do documentation changes! Thank you very much.

Überprüfe das bestehende "new"-Badge-Muster in der Dokumentations-Seitenleiste von TanStack AI und vergleiche es anschließend mit der Dokumentationsnavigation der anderen Bibliotheken. Lege fest, wie Seiten als neu oder kürzlich aktualisiert identifiziert werden, und überprüfe, dass die relevanten Badges nach Änderungen an der Dokumentation konsistent angezeigt werden.