* feat: drop reading other 'user' permission
Members of the platform can no longer read or list other users.
Resources that have "created_by" or "initiated_by" still retain
user context, but only include username and avatar url.
Attempting to read a user found via those means will result in
a 404.
* Hide /users page for regular users
* make groups a privledged endpoint
* Permissions page for template perms
* Admin for a given template enables an endpoint for listing users/groups.
