/docs/security/acl/acl-system was renamed in e9a42df from PR #12460 to
/docs/security/acl. A corresponding redirect was not added for this
page, resulting in a 404 being returned when accessing the old URL
path.
This commit redirects the former URL path to the new location, and
also updates all links on the site to point to the new location.
This section was actually about authentication (not authorization).
We already have sections in our api and cli docs. This commit removes the section and replaces
it with a short paragraph in the Tokens section which links to the existing docs.
* website: migrate to new nav-data format
* website: clean up unused intro content
* website: remove deprecated sidebar_title from frontmatter
* website: add react-content to fix global style import issue