Use an array of pages in pages.json

[superdump]

Instead of using an object where the key is the name of the page and the value is an object with a pageNumber key, perhaps it would be better to use the implicit ordering of an array. So perhaps something like this:

[
  ...
  {
    "pageId": "example-page",              // The ID of the page that also will be used in the URL. Should be a slugged version of the title.
    "title": "Example Page",               // The title of the page
    "description": "Example description.", // The description of the page that will be shown on the home page.
    "text": "pages/example-page.md",       // The text which will be shown in the guide.
    "code": "pages/example-page.js",       // The code that will be shown in the editor beside the text.
    "readOnly": false                      // If the code in the editor should be editable and runnable or not.
  },
  ...
]