Configuration API - Added career site configuration endpoints

Description

Extending Configuration API by adding the following endpoints to read career site configuration:

• GET /configuration/career-sites: Lists career sites configurations using pagination.
• GET /configuration/career-sites/{careerSiteId}: Get details of a single career site configuration by id.

To use these endpoints, you need to be granted the configuration_read access scope.

Impact

This enhancement is backward-compatible and does not require any changes to existing client implementations.

References

• Configuration API
• Access scopes