feat(main): Add base theme: This is the falcon theme out of the box.

This is falcon v3.1.2

falcon/templates/cms/_partials/sitemap-nested-list.tpl

@@ -0,0 +1,44 @@
+{**
+ * Copyright since 2007 PrestaShop SA and Contributors
+ * PrestaShop is an International Registered Trademark & Property of PrestaShop SA
+ *
+ * NOTICE OF LICENSE
+ *
+ * This source file is subject to the Academic Free License 3.0 (AFL-3.0)
+ * that is bundled with this package in the file LICENSE.md.
+ * It is also available through the world-wide-web at this URL:
+ * https://opensource.org/licenses/AFL-3.0
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@prestashop.com so we can send you a copy immediately.
+ *
+ * DISCLAIMER
+ *
+ * Do not edit or add to this file if you wish to upgrade PrestaShop to newer
+ * versions in the future. If you wish to customize PrestaShop for your
+ * needs please refer to https://devdocs.prestashop.com/ for more information.
+ *
+ * @author    PrestaShop SA and Contributors <contact@prestashop.com>
+ * @copyright Since 2007 PrestaShop SA and Contributors
+ * @license   https://opensource.org/licenses/AFL-3.0 Academic Free License 3.0 (AFL-3.0)
+ *}
+{block name='sitemap_item'}
+  <div class="list-group list-group-flush list-group-collapse">
+    {foreach $links as $link}
+
+      {if !empty($link.children)}
+        <div class="list-group-item list-group-item-action-dropdown">
+          <a class="text-reset stretched-link" id="{$link.id}" href="{$link.url}" title="{$link.label}">
+            {$link.label}
+          </a>
+        </div>
+        {include file='cms/_partials/sitemap-nested-list.tpl' links=$link.children}
+      {else}
+        <a class="list-group-item list-group-item-action" id="{$link.id}" href="{$link.url}" title="{$link.label}">
+          {$link.label}
+        </a>
+      {/if}
+
+    {/foreach}
+  </div>
+{/block}