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

app/models/user.rb

@@ -86,7 +86,7 @@ class User < ApplicationRecord
   has_many :session_activations, dependent: :destroy
 
   delegate :auto_play_gif, :default_sensitive, :unfollow_modal, :boost_modal, :delete_modal,
-           :reduce_motion, :system_font_ui, :noindex, :theme, :display_sensitive_media,
+           :reduce_motion, :system_font_ui, :noindex, :theme, :display_sensitive_media, :hide_network,
            to: :settings, prefix: :setting, allow_nil: false
 
   attr_accessor :invite_code
@@ -219,6 +219,10 @@ class User < ApplicationRecord
     settings.notification_emails['digest']
   end
 
+  def hides_network?
+    @hides_network ||= settings.hide_network
+  end
+
   def token_for_app(a)
     return nil if a.nil? || a.owner != self
     Doorkeeper::AccessToken