feat: add showGeojsonDataLabels prop

[jessicamcinchak]

When rendering a static geojson FeatureCollection (eg output by drawMode + drawMany), we want the option to display feature labels! Labels will be "off" by default. Styles (label position, size, stroke & fill) match configs for the drawing vector layer.

Examples for various drawType:

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[DafyddLlyr]

Working locally as expected, I'll keep an eye on repo for version bump 👍

When trying this out in the docs sandbox for this PR, I hit an error however. I'm using the following sandbox value -

<my-map
  geojsonColor="#ff0000"
  geojsonBuffer="10"
  hideResetControl
  staticMode 
  osVectorTilesApiKey="" 
  showGeojsonDataLabels
  geojsonData={"type": "Feature","properties": {"label": "dafydd","color": "hotpink"},"geometry": {"type": "Polygon","coordinates": [[[-0.128307852848053, 51.50748361634746],[-0.1274388171272278, 51.50773069282454],[-0.12710085879135133, 51.507243216327],[-0.12802890311050416, 51.50705957656797],[-0.128307852848053, 51.50748361634746]]]}}
/>

This throws the following error and does not display the map -

I suspect this is just an issue with the Pitsby sandbox as opposed to this PR, but just wanted to flag!