Fix geo GraphQL schema mismatch: camelCase → snake_case

All geo .graphql operations and consuming code updated to match
server schema which uses snake_case field/argument names.
Removed non-existent QuoteCalculations query, using NearestOffers instead.

graphql/operations/public/geo/NearestSuppliers.graphql

@@ -1,5 +1,5 @@
 query NearestSuppliers($lat: Float!, $lon: Float!, $radius: Float, $productUuid: String, $limit: Int) {
-  nearestSuppliers(lat: $lat, lon: $lon, radius: $radius, productUuid: $productUuid, limit: $limit) {
+  nearest_suppliers(lat: $lat, lon: $lon, radius: $radius, product_uuid: $productUuid, limit: $limit) {
     uuid
   }
 }