[plotly.js] Update to include sunburst specific properties and sunburstclick event

[MikeRippon]

The documentation on sunburst point data seems to be non-existent, and it seems to have very different properties to the existing PlotDatum definition (the docs say that it depends on trace type) so I made a new SunburstPlotDatum definition with all the properties I could sensibly figure out! Descriptions are in the test. Hope this is suitable!

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  Improve sunbust and treemap click events behavior plotly/plotly.js#4454
  https://plotly.com/javascript/plotlyjs-events/#event-data
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[typescript-bot]

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[typescript-bot]

🔔 @chrisgervang @martinduparc @frederikaalund @taoqf @Dadstart @szechyjs @MercifulCode @soorajpudiyadath @jonfreedman @meganrm @milesjos @SkipperCool @zeroyoichihachi @mtadams007 @marnett-git @peterblazejewicz @brammitch @blizzardjessica @olegshilov — please review this PR in the next few days. Be sure to explicitly select Approve or Request Changes in the GitHub UI so I know what's going on.

[brammitch]

Looks good!

[typescript-bot]

@LittleMikeDev Everything looks good here. Great job! I am ready to merge this PR on your behalf.

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(@chrisgervang, @martinduparc, @frederikaalund, @taoqf, @Dadstart, @szechyjs, @MercifulCode, @soorajpudiyadath, @jonfreedman, @meganrm, @milesjos, @SkipperCool, @zeroyoichihachi, @mtadams007, @marnett-git, @peterblazejewicz, @brammitch, @blizzardjessica, @olegshilov: you can do this too.)

[brammitch]

Ready to merge

[typescript-bot]

I just published @types/[email protected] to npm.