[Research] Adding outline to cities on the map

[irfirl]

Assuming we go with this design, how hard is it to create an outline like this from the api we currently use. Google Maps currently does this when you tap on a city name. @southerneer @aksonov @bengtan @thescurry

[southerneer]

I don't see a baked-in solution in the rn-maps API, but one idea would be to use the Geojson API combined with publicly available GeoJSON data to approximate this functionality. I don't think it would take more than a day to prototype something.