feat: add reactivity to formkit

frontend/spa/src/views/Checkout.vue

@@ -15,7 +15,7 @@
           :actions="false"
           @submit="onFormSubmit"
       >
-        <FormKitSchema :schema="checkoutFormSchema"/>
+        <FormKitSchema :schema="checkoutFormSchema" :data="data"/>
       </FormKit>
     </div>
 
@@ -76,6 +76,9 @@ const btnText = computed(() => {
   return checkout.isLoading ? 'Подождите...' : 'Создать заказ';
 });
 
+import { reactive } from 'vue';
+const data = reactive(checkout.form);
+
 function onCreateBtnClick() {
   try {
     submitForm('form-checkout');