Summary:
After taking a look at the existing animation docs, I found that most of the documentation on using `Animated` was spread out throughout the Animations guide and the `Animated` API reference, without any particular structure in place.
This PR aims to clean up the API reference, focusing on documenting all the provided methods exhaustively, and deferring to the Animations guide for long form examples and supporting content.
The `Easing` module is referred to at various points in the API reference, so I decided to clean up this doc as well. easings.net provides some handy visualizations that should make it easier for the reader to understand what sort of easing curve each method provides.
The site was built locally, and I verified all three documents render correctly.

Closes https://github.com/facebook/react-native/pull/12410
Differential Revision: D4581314
Pulled By: hramos
fbshipit-source-id: 27c0bce2afac8f084311b9d6113a2641133b42e5
Summary:fast & accurate implementation
See https://github.com/gre/bezier-easing
the library is embedded in React Native
fixes#6207 & to follow #6340 (or to replace it)
cc vjeux
tests
---
[the lib tests](https://github.com/gre/bezier-easing/blob/master/test/test.js) ensure the library is accurate.
It is tested that the library have a precision better than ±0.000001 .
performance
---
On my macbook pro, [the lib benchmark](https://github.com/gre/bezier-easing/blob/master/benchmark.js) have:
```
BezierEasing: instanciation x 1,043,725 ops/sec ±1.46% (82 runs sampled)
BezierEasing: call x 7,866,642 ops/sec ±0.93% (85 runs sampled)
BezierEasing: instanciation + call x 803,051 ops/sec ±1.58% (74 runs sampled)
```
Closes https://github.com/facebook/react-native/pull/6433
Differential Revision: D3045854
Pulled By: vjeux
fb-gh-sync-id: b3c5dba19195a6719967b4fdc8ef940cc067b1f4
shipit-source-id: b3c5dba19195a6719967b4fdc8ef940cc067b1f4
Summary: @public
This diff does a couple of things:
- Move all the code in a src/ folder
- Move bezier.js in the Animated folder
- Rename Animated.js into AnimatedImplementation.js and adds two entry points: AnimatedReactNative.js and AnimatedWeb.js
- Implement very dumb polyfills for flattenStyle, Set and InteractionManager
- Import my work in progress demo.html file to make sure that the code is actually working.
Everything is not working correctly:
- It calls forceUpdate on every frame and doesn't use bindings because setNativeProps is not implemented
- None of the style: {transform} are working because React web doesn't know about the array notation for transform
- The demo need more work
Reviewed By: @sahrens
Differential Revision: D2464277