Fixes https://github.com/payloadcms/payload/issues/9567. When using the
`AnimateHeight` component on a patched browser such as Webkit,
components with dynamically rendered children are not properly animating
in, such as blocks with rich text. This is because the height of that
content is unable to be calculated before it's rendered, preventing the
component from acquiring a target height to animate toward. This change
was originally introduced in #9456 in effort to remove unnecessary
dependencies.
The fix is to setup a ResizeObserver during animation to watch for
changes to the content's height. This way, as components dynamically
render in based on the "open" state, the hook will simply increment the
target height accordingly.
d04cea123c