Provide query hints to middleware

[Andy2003]

As pointetd out in https://github.com/neo4j-graphql/neo4j-graphql-java/pull/78#discussion_r432392618 we should provide query hints to the middleware so it can be passed through to the client.

For example a hint should be passed to the client if it queries an n..m relation without specifying the _every syntax explicitly. The decision to use _every should be well considered, as it can slow down queries considerably