Google Maps Geocoding API adapter.

Requires a valid Google Maps API key with the Geocoding API enabled.

Usage:
  (def adapter (create-google-adapter {:api-key "AIza..."}))
  (geocode adapter {:address "Damrak 1, Amsterdam"})

Mapbox Geocoding API adapter.

Requires a valid Mapbox access token.
Note: Mapbox returns coordinates as [longitude, latitude] (GeoJSON order).

Usage:
  (def adapter (create-mapbox-adapter {:api-key "pk.eyJ1..."}))
  (geocode adapter {:address "Damrak 1, Amsterdam"})

OpenStreetMap Nominatim geocoding adapter.

Rate limit: 1 request per second (OSM usage policy requires this).
No API key required. A descriptive User-Agent header is mandatory.

Usage:
  (def adapter (create-nominatim-adapter {:user-agent "MyApp/1.0 (contact@example.com)"}))
  (geocode adapter {:postcode "1012 JS" :city "Amsterdam"})