Add coordinate-based GraphQL operations for geo API

- Add NearestHubs.graphql - find hubs near coordinates
- Add NearestOffers.graphql - find offers near coordinates
- Add NearestSuppliers.graphql - find suppliers near coordinates
- Add RouteToCoordinate.graphql - route from offer to coordinates
- Regenerate geo-generated.ts with new operations

These operations simplify frontend logic by working with coordinates
instead of requiring entity-specific queries.

graphql/operations/public/geo/NearestHubs.graphql

@@ -0,0 +1,11 @@
+query NearestHubs($lat: Float!, $lon: Float!, $radius: Float, $productUuid: String, $limit: Int) {
+  nearestHubs(lat: $lat, lon: $lon, radius: $radius, productUuid: $productUuid, limit: $limit) {
+    uuid
+    name
+    latitude
+    longitude
+    country
+    countryCode
+    transportTypes
+  }
+}