feature(core): add APIs for View Transitions

There should be API to deal with [`:view-transition-*`](https://developer.mozilla.org/en-US/docs/Web/CSS/::view-transition) pseudo elements and [`view-transition-name`](https://developer.mozilla.org/en-US/docs/Web/CSS/view-transition-n) & [`view-transition-class`](https://developer.chrome.com/blog/view-transitions-update-io24#view-transition-class).