feature: supply client side directives com.netflix.graphql.dgs.client.codegen.GraphQLQueryRequest

[mores]

As a client I have been using:

FooGraphQLQuery.Builder builder = FooGraphQLQuery.newRequest();
FooGraphQLQuery query = builder.build();
GraphQLQueryRequest request = new GraphQLQueryRequest(query, root);

to generate my graphql. I now have to supply an @idempotent directive ( https://shopify.dev/docs/api/usage/idempotent-requests ) and not sure how that can be done using the existing framework.