"breadcrumbs" column should be a JSON array of links, like "references"

[simonw]

https://latest-docs.datasette.io/docs/sections/authentication%3Aallowdebugview is currently:

id	page	ref	title	content	breadcrumbs	references
authentication:allowdebugview	authentication	allowdebugview	The /-/allow-debug tool	The /-/allow-debug tool lets you try out different "action" blocks against different "actor" JSON objects. You can try that out here: https://latest.datasette.io/-/allow-debug	["Authentication and permissions", "Permissions"]	[{"href": "https://latest.datasette.io/-/allow-debug", "label": "https://latest.datasette.io/-/allow-debug"}]

Breadcrumbs should be something like this instead:

[
  {
    "href": "authentication.html",
    "label": "Authentication and permissions"
  }, {
    "href": "authentication.html#permissions",
    "label": "Permissions"
  }
]