Improve pie package

[plouc]

Updates/additions:

• Remove the PieLayout component in favor of hooks.
• Add support for layers.
• Fix support for colors coming from the dataset.
• Improve documentation.
• Add proper unit tests.
• Add the ability to handle custom datum via the id and value property accessors.
• Add d3 formatting support for values.
• Add support for mouse enter/move/leave handlers.
• Honor isInteractive property, removing handlers when disabled.

Resolves the following issues:

• fix Features Donut #751, fixing broken behavior when using colors coming from data and adding a story.
• fix Animate individual pie slice #649 with layers support and custom slice component.
• fix Pie: tooltip alignment #662, adding the ability to configure tooltip anchor.
• fix Using an icon as pie chart label. #629, can now be done using a custom layer.
• fix Adjust Pie chart sliceLabel position #819, adding the ability to define where the slice labels are positioned.

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[wyze]

Boom! 💥 Awesome work @plouc!