Allow query schemes from Apollo tools to be imported

[ellioseven]

persistgraphql is being deprecated:

apollographql/persistgraphql#67

I have replaced the extraction method with: https://github.com/apollographql/apollo-tooling

Upon extracting queries with this tool, the format is quite different:

{
  "version": 1,
  "operations": [
    {
      "signature": "...",
      "document": "...",
      "metadata": {
        "engineSignature": "..."
      }
    }
  ]
}

To avoid developers having to postprocess the data, it would be nice if the GraphQL module could support the upload of the manifest file.