Similarly to #16 we need a new REST API endpoint for searching and listing all authors from the context of a user who can assign authors to a post.
We need this because we'll allow lower level users to search authors and I don't want to change the permissions of the /users endpoint.
Should require authentication as there's no use case for using this in an unauthenticated situation. You can use /users unauthenticated to fetch a list of users with published content.
Will be primarily used for searching users from the authors control on post editing screens
Similarly to #16 we need a new REST API endpoint for searching and listing all authors from the context of a user who can assign authors to a post.
We need this because we'll allow lower level users to search authors and I don't want to change the permissions of the
/usersendpoint./usersunauthenticated to fetch a list of users with published content.