Better Image API Parity with React Native
_I am..._

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| Requesting a new feature
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**Proposal/Feature-request:**

Improve the Image API parity with React Native by adding some of the static methods and extra props like `blurRadius`.

The main API method that would be useful is `Image.getSize()` to make getting image aspect ratios easier, for better use with the `useWindowDimensions` API. It's possible methods like `onLayout` could be implemented with the efforts in #472 too.

Implementation details:

- https://github.com/sketch-hq/sketch-reference-files/blob/master/files/123/images/pages/BE059DA8-F958-4C4A-A294-4FFB0713F90C.json#L100-L101
- https://developer.sketch.com/reference/api/#imagedata – (but probably not much use as won't work in Node.js/cross-platform mode)