(feature) css.keyframes() and CSS animations

### Describe the feature request

Support `css.keyframes` on native. We can use `Animated` to polyfill this API and the following CSS props:

* `animationDelay`
* `animationDirection`
* `animationDuration`
* `animationFillMode`
* `animationIterationCount`
* `animationName`
* `animationPlayState`
* `animationTimingFunction`