[WIP] Add navigation partial view

Co-authored-by: Sonia Hussain <CodeSonia@users.noreply.github.com>

Author: sairamya93

app/views/flexible_page/flexible_sections/_navigation.html.erb

@@ -0,0 +1,11 @@
+<div class="govuk-grid-row flexible-section">
+  <%= render "govuk_publishing_components/components/service_navigation", {
+  navigation_items: [
+    {
+      text: flexible_section.text,
+      href: flexible_section.url,
+      active: true,
+    },
+  ],
+} %>
+</div>