Refactor (www): Use nodes in gatsbyjs.org code instead of edges.node

[tesseralis]

Summary

Since Gatsby v2.2.0, it's been possible to use nodes instead of edges.node in GraphQL queries. All instances of:

query {
  someNodes {
    edges {
      node {
        <fields>
      }
    }
}

can be replaced with:

query {
  someNode {
    nodes {
      <fields>
    }
  }
}

The code that iterates over these can also change from

someNode.edges.forEach({ node }) => {
 doSomething(node)
})

to:

someNode.nodes.forEach(node => {
  doSomething(node)
})

Motivation

Code cleanliness of the gatsby website. Using up-to-date examples in our codebase can help guide people in showing good patterns, even if our docs can't update those examples due to back-compat issues.

[b0nbon1]

@tesseralis Awesome, interested in contributing I'd like to grab it.

[tesseralis]

@b0nbon1 sure, go ahead!

[github-actions]

Hiya!

This issue has gone quiet. Spooky quiet. 👻

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[github-actions]

Hey again!

It’s been 30 days since anything happened on this issue, so our friendly neighborhood robot (that’s me!) is going to close it.
Please keep in mind that I’m only a robot, so if I’ve closed this issue in error, I’m HUMAN_EMOTION_SORRY. Please feel free to reopen this issue or create a new one if you need anything else.
As a friendly reminder: the best way to see this issue, or any other, fixed is to open a Pull Request. Check out gatsby.dev/contribute for more information about opening PRs, triaging issues, and contributing!

Thanks again for being part of the Gatsby community! 💪💜