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

This is falcon v3.1.2

_dev/js/listing/index.js

@@ -0,0 +1,47 @@
+import $ from 'jquery';
+import prestashop from 'prestashop';
+import Filters from '@js/listing/components/filters/Filters';
+
+function updateProductListDOM(data) {
+  $(prestashop.themeSelectors.listing.searchFilters).replaceWith(
+    data.rendered_facets,
+  );
+  $(prestashop.themeSelectors.listing.activeSearchFilters).replaceWith(
+    data.rendered_active_filters,
+  );
+  $(prestashop.themeSelectors.listing.listTop).replaceWith(
+    data.rendered_products_top,
+  );
+
+  const renderedProducts = $(data.rendered_products);
+  const productSelectors = $(prestashop.themeSelectors.listing.product);
+
+  if (productSelectors.length > 0) {
+    productSelectors.removeClass().addClass(productSelectors.first().attr('class'));
+  } else {
+    productSelectors.removeClass().addClass(renderedProducts.first().attr('class'));
+  }
+
+  $(prestashop.themeSelectors.listing.list).replaceWith(renderedProducts);
+  $(prestashop.themeSelectors.listing.listBottom).replaceWith(data.rendered_products_bottom);
+
+  if (data.rendered_products_header) {
+    $(prestashop.themeSelectors.listing.listHeader).replaceWith(data.rendered_products_header);
+  }
+
+  prestashop.emit('updatedProductList', data);
+}
+
+$(() => {
+  /* eslint no-unused-vars: ["error", { "varsIgnorePattern": "filters" }] */
+  const filters = new Filters();
+
+  prestashop.on('updateProductList', (data) => {
+    updateProductListDOM(data);
+    window.scrollTo(0, 0);
+  });
+
+  prestashop.on('updatedProductList', () => {
+    prestashop.pageLazyLoad.update();
+  });
+});