feat: add a repeating parameter to animated list

[janoma]

Allow the animated list to keep running without having to resort to passing arbitrarily long lists. Particularly useful in long landing pages where a user might see the animation but scroll somewhere else and go back to the animation later, when it would be over if it's not repeating (and the list was short enough).

Bonus per boy scout rule: adding cn to prevent undefined to appear in the class list when className is not present.

[vercel]

@janoma is attempting to deploy a commit to the product-studio Team on Vercel.

A member of the Team first needs to authorize it.