doc: added missing import in auto-form example

I've added a missing import of `auto-form` to the first complete example as without the code, it would not run right away.

apps/www/src/content/docs/components/auto-form.md

@@ -403,6 +403,7 @@ By passing the `form` as props, you can control and use the method provided by `
 
 ```vue
 <script setup lang="ts">
+import { AutoForm } from '@/components/ui/auto-form'
 import { toTypedSchema } from '@vee-validate/zod'
 import { useForm } from 'vee-validate'
 import * as z from 'zod'