Alternative text - Accessibility

[neiltomlin]

https://www.w3.org/TR/WCAG21/#non-text-content
https://dequeuniversity.com/rules/axe/4.1/svg-img-alt

The rendered SVG for the Pie/Donut has no title attribute or child text element that describes the graphic. This is required by widely accepted web accessibility standards.

Can the component be augmented to take a Prop to pass any or all of the following?

• Text to a title attribute or element
• Text to an aria-label attribute
• An ID to an aria-labelledby attribute

[wyze]

I agree we need to be more accessible with all the charts. It looks like a couple of your suggestions were mentioned in #126 already. We just have not got around to implementing them yet.