As a Developer, I want to have a full implementation of GraphQL for read, search, write

The bundle has been started by bertrand.dunogier@ez.no here:
https://github.com/bdunogier/ezplatform-graphql-bundle

Live playground:
http://graphql-v3jryei-og4blmttpsfvm.eu.platform.sh/graphiql

TODO (WIP):

• v1 Read
  • Cover most of the model
  • Http Caching, dealing with response tagging, depends on multi cache tagging
• v2 Write
  • Mutation support
  • Look into if we can safely describe the more complex workflows and other business logic needs of eZ Repository in a sane way, identify serial actions typically done together like update draft and publish it.
• vX
  • Repository API improvements to improve serialization and lookup performance, cursor support