Contribute 2020 Challenge - add improvements & examples to GraphQL Getting Started

Problem to solve

Contribute 2020 Challenge to improve documentation.

Proposal

Based on personal, initial usage from SA/TAM/IE, we are proposing the following doc updates to assist Users getting started with GraphQL and GraphiQL.

• Add additional working examples
  • Walkthru showing how to take a GraphiQL query and automate in scripting
  • Additional working examples with curl
  • Example(s) filtering output with e.g. jq
  • Example using chrome devtools, [e.g. copy as curl]
  • Using GraphiQL to explore the GraphQL data model
• Clarify authentication
  • Personal Token access settings
• Troubleshooting
• Add Charlie & Sameer's Contribute videos

Who can address the issue

Notes

• SME: Simon Mansfield
• Channel: f_graphql

Other links/references

Getting Started Guide: https://docs.gitlab.com/ee/api/graphql/getting_started.html