Drupal 10 Compatibility Fixes for Ubercart uc_country Module

Problem/Motivation

The uc_country module in Ubercart is designed to handle country management and related functionality in Drupal 8. However, due to significant architectural changes in Drupal 9 and 10, the module requires updates to ensure compatibility with Drupal 10.

Issue : Entity type 'Drupal\uc_country\Entity\Country' is missing 'config_export'

Entity type Drupal\uc_country\Entity\Country is missing the config_export definition in its annotation, which is required in Drupal 10 for proper configuration synchronization.