Add more customizability to Pie radial label

[akvashi24]

Is your feature request related to a problem? Please describe.
My main issue is that the radial label doesn't support onClick functionality

Describe the solution you'd like
Either a prop on Pie to allow onClick for radialLabel or extending the radialLabel prop to allow a completely custom label, similar to Radar

Describe alternatives you've considered
I have to be satisfied with clicking the slices on the pie, but it's not an alternative

Additional context
Happy to add an onClick function in a PR, but a completely custom radiallabel makes more sense to me

[plouc]

We're gonna be able to pass an arcLabelsComponent to the pie chart to completely customize the behavior/look of it once #1350 gets merged, the pie package is gonna contain some BC breaks though, several props were renamed and transitions are now supported.

You can already play with it using this codesandbox (which can be forked if you wish to try using it with your own setup) and the default component is available here.
Please note that the component is gonna receive spring values, not regular values in order to support transitions, so react-spring animated components should be used in lieu of regular elements.

There's also a few other improvements like the ability to grow the arcs radius on hover.