fix(search): geocode through the server, not the browser

- Google's Geocoding web service refuses referrer-restricted keys, so the
  browser call forced GOOGLE_MAPS_API_KEY to ship unrestricted
- add /api/google/geocode and /api/google/reverse-geocode, using the server
  key like Places and Street View already do
- the browser key now needs the Map Tiles API only

server/providers/local.js

@@ -66,6 +66,9 @@ export { LL2_CACHE_TTL_MS, launchLibraryRequestHeaders } from './space.js';
 export { googlePlacesContextProxy } from './places.js';
 export { googleServerApiKey } from './places.js';
 export { keylessGooglePlacesResponse } from './places.js';
+export { keylessGoogleGeocodeResponse } from './places.js';
+export { validateGeocodeAddress } from './places.js';
+export { geocodeBounds } from './places.js';
 export { adsbLolFallbackAnchor } from './aircraft/opensky.js';
 export { readResponseTextCapped } from './common/http.js';
 export { readResponseJsonCapped } from './common/http.js';