Geo distance support

[markwalkom]

Similar to #7572, it'd be rad if a user could pick a map and then a point and drag from there to a distance to build geo distance/geo range type vizs.

Having a text box you could type the distance from the point you pick, or the ranges from the point, would be great too.

[thomasneirynck]

One of the more difficult issues is getting this right "visually". Leaflet's drawing tools are fairly limited and work in the reference of the projection (web mercator), while the distance measurement in ES do not I believe. So drawing a circle in Leaflet is not a real circle on the surface of the earth.

@nknize the plane type for geo_distance, what projection does it use? I guess this would be an equidistant/platte carree projection?

[thomasneirynck]

We are working on a new implementation of map visualizations and are not planning to add any new features to the existing implementation. We will take this suggestion under consideration for the new app.

[thomasneirynck]

Duplicates #55980. I'll close this one, since the other one is already assigned. wrt. to getting the visuals right, @nreese suggested using https://www.npmjs.com/package/@turf/circle to get a good approximate for the "egg"-shape we'd get when drawing circles at global scales.