Add a link to osm.org/fixthemap when a search returns zero results

[ellenhp]

I had this idea while talking with some folks in the OpenStreetMap slack. I think it would be really cool to kick people back to OSM to map their own local places, improving OSM, headway and maps.earth for everybody.

I like the way it's explained here. Specific to pelias but still. https://geocode.earth/blog/2020/virtuous-cycle