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/follower_accounts_controller.rb

@@ -6,11 +6,15 @@ class FollowerAccountsController < ApplicationController
   def index
     respond_to do |format|
       format.html do
+        next if @account.user_hides_network?
+
         follows
         @relationships = AccountRelationshipsPresenter.new(follows.map(&:account_id), current_user.account_id) if user_signed_in?
       end
 
       format.json do
+        raise Mastodon::NotPermittedError if params[:page].present? && @account.user_hides_network?
+
         render json: collection_presenter,
                serializer: ActivityPub::CollectionSerializer,
                adapter: ActivityPub::Adapter,