Documentation Revamp

Thanks for the feedabck @RJKeevil. For the clients, we would like to clarify GraphQL clients (make it clear that we don’t have a GraphQL client but we work well with any popular GraphQL client), programmatic clients (Go, Java, python…) and UI clients (Ratel and more to come).

For the programmatic clients, could you clarify your request for the versions : do you think we should align the client version with Dgraph version and have the clients built with the Dgraph build or are you referring to a separate doc page for clients so you can browse the client version history ?