Add footer and sidebar shared partials

- Add code in Factory to rejig links into the desired internal format

app/models/content_item_factory.rb

@@ -1,9 +1,19 @@
 class ContentItemFactory
   def self.build(content_hash)
+    content_hash["links"]["ordered_related_items"] = ordered_related_items(content_hash["links"]) if content_hash["links"]
+
     content_item_class(content_hash).new(content_hash)
   end
 
   def self.content_item_class(_content_hash)
     ContentItem
   end
+
+  def self.ordered_related_items(links)
+    return [] if links["ordered_related_items_overrides"].present?
+
+    links["ordered_related_items"].presence || links.fetch(
+      "suggested_ordered_related_items", []
+    )
+  end
 end

app/views/shared/_footer_navigation.html.erb

@@ -0,0 +1,11 @@
+<% @contextual_footer = capture do %>
+  <%= render 'govuk_publishing_components/components/contextual_footer', content_item: @content_item.to_h %>
+<% end %>
+
+<% if @contextual_footer.present? %>
+  <div class="govuk-grid-row">
+    <div class="govuk-grid-column-two-thirds">
+      <%= @contextual_footer %>
+    </div>
+  </div>
+<% end %>

app/views/shared/_sidebar_navigation.html.erb

@@ -0,0 +1,3 @@
+<div class="govuk-grid-column-one-third">
+  <%= render 'govuk_publishing_components/components/contextual_sidebar', content_item: @content_item.to_h %>
+</div>