Handle diagonal and perpendicular parking

[dabreegster]

Thanks to @ginnyTheCat for fixing some parsing bugs in Muv

Here's how perpendicular spots at https://strassenraumkarte.osm-berlin.org/?map=micromap#19/52.47214/13.43922 look:

And diagonals at https://strassenraumkarte.osm-berlin.org/?map=micromap#19/52.47450/13.42235:

252 tracks further work to handle separately mapped parking areas