🐛 Move some methods to be public

This commit will move #solr_document, #current_ability, and #request to
be public methods.  Since these methods in Hyrax were not private, in
the decorator it should not be private either.

Ref:
  - https://github.com/samvera/hyrax/blob/b334e186e77691d7da8ed59ff27f091be1c2a700/app/presenters/hyrax/file_set_presenter.rb#L10

app/presenters/concerns/hyrax/iiif_av/displays_content_decorator.rb

@@ -8,21 +8,21 @@ module IiifAv
     #   request.base_url => hostname
     # also to remove #auth_service since it was not working for now
     module DisplaysContentDecorator
-      private
+      def solr_document
+        defined?(super) ? super : object
+      end
 
-        def solr_document
-          defined?(super) ? super : object
-        end
+      def current_ability
+        defined?(super) ? super : @ability
+      end
 
-        def current_ability
-          defined?(super) ? super : @ability
-        end
+      def request
+        Request.new(base_url: hostname)
+      end
 
-        Request = Struct.new(:base_url, keyword_init: true)
+      private
 
-        def request
-          Request.new(base_url: hostname)
-        end
+        Request = Struct.new(:base_url, keyword_init: true)
 
         def image_content
           return nil unless latest_file_id