fix(AuthForm): use error from form field (#4738)

Author: Barbapapazes

src/runtime/components/AuthForm.vue

@@ -200,6 +200,7 @@ defineExpose({
           :name="field.name"
           :size="field.size"
           :required="field.required"
+          :error="field.error"
         >
           <slot :name="`${field.name}-field`" v-bind="{ state, field }">
             <UCheckbox

test/components/AuthForm.spec.ts

@@ -7,7 +7,8 @@ describe('AuthForm', () => {
   const fields = [{
     name: 'email',
     label: 'Email',
-    type: 'text' as const
+    type: 'text' as const,
+    error: 'Invalid email format'
   }, {
     name: 'password',
     label: 'Password',