Add preference to hide following/followers lists (#7532)

* Add preference to hide following/followers lists

- Public pages
- ActivityPub collections (does not return pages but does give total)
- REST API (unless it's your own) (does not federate)

Fix #6901

* Add preference

* Add delegation

* Fix issue

* Fix issue

app/models/account.rb

@@ -136,6 +136,7 @@ class Account < ApplicationRecord
            :moderator?,
            :staff?,
            :locale,
+           :hides_network?,
            to: :user,
            prefix: true,
            allow_nil: true