Is it worth it to add a light animation library or to explore other ways of animating `auto` sizes?

[alcercu]

          let's check if https://macarthur.me/posts/modern-box-sliding/#sliding-w-interpolate-size works so we can avoid having to use the `style` and add the element with conditional rendering, instead of just hiding it with `overflow-hidden` 🤔 we can also think if it makes sense to add an animation library for this kind of things

Originally posted by @alcercu in #64 (comment)