feat(uploader): add component

[matmkian]

General summary

Add uploader component.

Screenshots

[gcornut]

@matmkian I've done the React part. Here is what I added which is not in angular:

• Default size is set to XL since the component does not look good with sizes under that
• Size range is limited to XL and XXL
• The aspect ratio will be overriden to "square" if the variant is "circle" to prevent weird oval shape

Let me know if you are against any of theses. I can implement them in Angular too if you want

[matmkian]

@gcornut, you're so perfect! If you can implement those changes in the Angularjs version that would be perfect!

[FlorentDinet]

I see a lot of differences with the mockups https://app.zeplin.io/project/5beed1207b5f913ebc61d14e/dashboard?seid=5dadbbbc7ef2d22c514c286b
is this wanted ?

Also AspectRatio.original seems broken (no background and somewhat no bounding box)

[matmkian]

Need to talk about that @FlorentDinet , only did https://app.zeplin.io/project/5beed1207b5f913ebc61d14e/screen/5dbfe0c71ad43e22ffd2e906 and no original aspect ratio

[FlorentDinet]

Ok to discuss, it's a nice start let's merge, and improve later