🧹 Add Hyku::WorkShowPresenter#viewer?

This was a method that slide into the commit history with the following commits/PRs

Related to:

- scientist-softserv/palni-palci@bf0748774
- scientist-softserv/palni-palci@755e4f5c
- scientist-softserv/palni-palci@41a8e7e2f
- scientist-softserv/palni-palci#911
- scientist-softserv/palni-palci#927

app/presenters/hyku/work_show_presenter.rb

@@ -73,6 +73,10 @@ def show_pdf_download_button?
       show_pdf_download_button.first.to_i.positive?
     end
 
+    def viewer?
+      iiif_viewer? || video_embed_viewer? || show_pdf_viewer?
+    end
+
     def parent_works(current_user = nil)
       @parent_works ||= begin
         docs = solr_document.load_parent_docs
@@ -85,8 +89,16 @@ def parent_works(current_user = nil)
       end
     end
 
+    def video_embed_viewer?
+      extract_video_embed_presence
+    end
+
     private
 
+      def extract_video_embed_presence
+        solr_document[:video_embed_tesim]&.first&.present?
+      end
+
       def iiif_media?(presenter: representative_presenter)
         presenter.image? || presenter.video? || presenter.audio? || presenter.pdf?
       end