Introducing the @configureDescription directive for GraphQL Federation

The `@configureDescription` directive for GraphQL Federation aims to provide schema designers with fine-grained control over how descriptions are propagated, overridden, or hidden from the federated graph. This directive addresses issues such as inconsistent, redundant, or misleading descriptions that can lead to confusion and errors for API consumers. It offers four main functions: propagating a description, overriding a description, preventing the propagation of a description, and propagating a description through an extension type. The constraints for using this directive are relatively simple, ensuring explicit and collaborative use. By adopting this directive, teams can streamline their API documentation, enhance the developer experience, and improve the overall consistency of their federated schemas.