- Added UserMessageService to have common methods for showing messages and errors to the user.
- Added Result record so services can return status on operation error (so it can be shown in the UI messages).
- Updated services to use the new Result record.
- Updated pages to use the new IUserMessageService.
- Added new CountryCodeUtils to map ISO-3166:Alpha2 country codes to ISO-3166:Alpha3 codes.
- Added new config for results language of AddressQuery services.