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

This is falcon v3.1.2

falcon/templates/checkout/_partials/steps/checkout-step.tpl

@@ -0,0 +1,53 @@
+{**
+ * 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='step'}
+  <section  id    = "{$identifier}"
+            class = "{[
+                        'checkout-step'   => true,
+                        '-current'        => $step_is_current,
+                        '-reachable'      => $step_is_reachable,
+                        '-complete'       => $step_is_complete,
+                        'js-current-step' => $step_is_current
+                    ]|classnames}"
+  >
+    <div class="card-header checkout-step__header" id="heading-{$identifier}" data-identifier="{$identifier}">
+      <p class="step-title js-step-title h5 mb-0">
+        <span class="step-number">{$position}.</span>
+        {$title}
+        <i class="material-icons font-reset rtl-no-flip text-success mx-2">&#xE876;</i>
+
+        {if $step_is_reachable}
+          <button class="step-edit text-muted btn btn-sm btn-link float-right py-0" data-toggle="collapse" data-target="#content-{$identifier}" aria-expanded="{if $step_is_current}true{else}false{/if}" aria-controls="content-{$identifier}">
+            <i class="material-icons edit small">mode_edit</i> {l s='Edit' d='Shop.Theme.Actions'}
+          </button>
+        {/if}
+      </p>
+    </div>
+
+    <div class="content checkout-step__content card-body">
+      {block name='step_content'}DUMMY STEP CONTENT{/block}
+    </div>
+  </section>
+{/block}