Use placemark's polyline in favor of mapbox's polyline

[smellyshovel]

There's a new polyline package from Placemark:

• https://github.com/placemark/polyline
• https://github.com/mapbox/polyline

As highlighted in the readme, it is maintained, it uses [lon, lat] order, it doesn't have any depencencies and it is typed.

Using it would simplify the decoding process from decode(geometry).map((coordinate) => coordinate.reverse()) to decode(geometry).

I'd like to use it in my own codebase but I don't want to use both since Mapbox's package is a dependency of maplibre-gl-directions.

So it'd be great if you would consider switching packages.

Originally posted by @clementmas in https://github.com/maplibre/maplibre-gl-directions/discussions/211

[smellyshovel]

@clementmas would you like me to set you as assignee?