Note I kept PolygonControls.svelte, because it needs to use govuk components, unlike the common library. And I also kept PolygonToolLayer.svelte because it uses layerId for custom z-ordering logic, and I haven't found a clean way to include that in the common library. (The drawing component included there could be customized in any number of ways for colors/style, so it might make sense for users to just adapt that code manually.)
I refactored https://github.com/dabreegster/maplibre-draw-polygon to use in other projects, so we can clean up some code here.
Note I kept
PolygonControls.svelte, because it needs to use govuk components, unlike the common library. And I also keptPolygonToolLayer.sveltebecause it useslayerIdfor custom z-ordering logic, and I haven't found a clean way to include that in the common library. (The drawing component included there could be customized in any number of ways for colors/style, so it might make sense for users to just adapt that code manually.)