Proximity search and distance calculation for address coordinates

[MoritzLost]

Addresses have an optional latLong native property that can be added to the field layout and store coordinates. For addresses with coordinates, it would be great to use those for proximity searches and distance calculations.

Proximity search

Narrowing an address query based on the coordinates, for example:

• Return all addresses within a specified distance from a given point.
• Return all addresses within a given bounding box or other shape.
• Order the query by distance to a given point.

Distance calculation

A helper method, twig function or method for addresses to calculate the distance between the addresses coordinates and a given point. Optionally, a query with a proximity parameter could also set the distance between that point and the coordinates of the address.

Example

The Google Maps plugin supports proximity search and distance calculations for the built-in address field.

[MoritzLost]

I've opened a PR as a proof-of-concept: #17429