Provide stable cursor based pagination

Currently only offset based pagination is available in stable Hasura. The cursor based pagination is handled by the beta relay API. There are two problems:

• this is a different endpoint which is cumbersome in client developement
• it is currently incompatible with limiting the length of the request, see https://github.com/hasura/graphql-engine/issues/9578

I'm adding this issue to track the problem.