GraphQL Resolver Middleware Utility

The `graphql-add-middleware` package, currently at version 0.3.7, offers a dedicated solution for injecting custom middleware logic directly into GraphQL schema resolvers. It enables developers to apply a function before and after resolver execution, allowing for operations such as logging, authentication checks, argument manipulation, or result transformation. The utility provides granular control, supporting global application to all resolvers, scoped application to all resolvers of a specific GraphQL type (e.g., `Query`, `Mutation`), or precise targeting of a single field within a type (e.g., `Query.posts`). Released in 2017 and last updated around that time, the package is effectively abandoned, which means it has no active development, bug fixes, or compatibility updates for newer GraphQL versions. Its primary differentiator is its singular focus on direct schema modification for middleware injection, rather than being integrated into a larger GraphQL server framework, requiring users to explicitly manage the `GraphQLSchema` object. This narrow scope can be beneficial for those who need a lightweight solution to augment an existing schema without adopting an entire framework.