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

This is falcon v3.1.2

_dev/js/product/index.js

@@ -0,0 +1,45 @@
+import $ from 'jquery';
+import ProductGallery from '@js/product/components/ProductGallery';
+
+function activateFirstProductTab() {
+  $('.product-tabs .nav .nav-item:first-child a').tab('show');
+}
+
+function handleProductDetailsToggle() {
+  const $link = $('[href="#product-details"]');
+  const $tab = $($link.attr('href'));
+
+  if ($tab.length && $link.length && $link.hasClass('active')) {
+    $tab.addClass('show active');
+  }
+}
+
+$(() => {
+  activateFirstProductTab();
+  const gallery = new ProductGallery();
+
+  gallery.init();
+
+  prestashop.on('updatedProductCombination', (event) => {
+    gallery.init();
+
+    const { product_add_to_cart: productAddToCart } = event;
+
+    if (productAddToCart) {
+      const node = document.createElement('div');
+      node.innerHTML = productAddToCart;
+
+      const html = node.querySelector('.js-product-actions-buttons');
+
+      if (html) {
+        const productActionsElement = document.querySelector('.js-product-actions-buttons');
+
+        productActionsElement.replaceWith(html);
+      }
+    }
+  });
+
+  prestashop.on('updatedProduct', () => {
+    handleProductDetailsToggle();
+  });
+});