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

_dev/js/theme/components/customer.js

@@ -0,0 +1,18 @@
+import $ from 'jquery';
+
+function initRmaItemSelector() {
+  $(`${prestashop.themeSelectors.order.returnForm} table thead input[type=checkbox]`).on('click', ({ currentTarget }) => {
+    const checked = $(currentTarget).prop('checked');
+    $(`${prestashop.themeSelectors.order.returnForm} table tbody input[type=checkbox]`).each((_, checkbox) => {
+      $(checkbox).prop('checked', checked);
+    });
+  });
+}
+
+function setupCustomerScripts() {
+  if ($('body#order-detail')) {
+    initRmaItemSelector();
+  }
+}
+
+$(document).ready(setupCustomerScripts);