ISTWCMS-3506: adding templates for global footer

templates/blocks/block--uw-fdsu-theme-resp-uw-block-global-footer-menu.html.twig

+{% block content %}
+  {{ content }}
+{% endblock %}

templates/menus/menu--uw-menu-global-footer.html.twig

+{% include "@components/menu/menu--footer/menu--footer.twig" with {
+  'menu_name': 'uw-footer',
+  'items': items
+} %}

templates/regions/region--footer.html.twig

+{#
+/**
+ * @file
+ * Theme override to display a region.
+ *
+ * Available variables:
+ * - content: The content for this region, typically blocks.
+ * - attributes: HTML attributes for the region div.
+ * - region: The name of the region variable as defined in the theme's
+ *   .info.yml file.
+ *
+ * @see template_preprocess_region()
+ */
+#}
+{% set social_media = simplify_menu('uw-menu-global-social-media') %}
+
+{% embed '@layouts/footer/footer.twig' with {
+  "social_media": social_media,
+  "social_media_placement": "global-site-footer"
+} %}
+
+  {% block content %}
+    {{ content }}
+  {% endblock %}
+
+{% endembed %}