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/controllers/settings/preferences_controller.rb

@@ -44,6 +44,7 @@ class Settings::PreferencesController < ApplicationController
       :setting_system_font_ui,
       :setting_noindex,
       :setting_theme,
+      :setting_hide_network,
       notification_emails: %i(follow follow_request reblog favourite mention digest),
       interactions: %i(must_be_follower must_be_following)
     )