add documents editor

app/controllers/template_documents_page_objects_controller.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+class TemplateDocumentsPageObjectsController < ApplicationController
+  load_and_authorize_resource :template
+
+  def index
+    attachment = @template.documents_attachments.find_by!(uuid: params[:attachment_uuid])
+
+    render json: Templates::ModifyDocuments.page_objects(attachment, params[:page].to_i)
+  end
+end