Yiisoft\Form\YiisoftFormModel\FormModel is not exist

in docs https://github.com/yiisoft/form/blob/master/docs/creating-forms.md
i see `use Yiisoft\Form\YiisoftFormModel\FormModel;` but package has no such file as like FormModel class at all.


### Additional info

| Q                | A
| ---------------- | ---
| Version          | 1.0.?
| PHP version      | 8.2.9
