Handle parking areas

Like https://www.openstreetmap.org/way/888214564. Very unclear how to represent them in osm2streets -- they don't fit into the model of "everything is a road segment with lanes or junction". https://strassenraumkarte.osm-berlin.org/?map=micromap#19/52.47345/13.43859 seems to logically associate them with the street.

Do we snap these to a Road and add synthetic lanes? We'd have to split roads sometimes, or support features that don't occupy the whole width. Doesn't feel like the right approach.

We could just store and render them as areas and maybe provide a logical linking to the road for consumers that want to know "how much parking along a Road". Feels like the cleaner solution. And it feels like it's a gateway towards thinking about pedestrian areas.