I'd like to request a feature that allows custom fields to block collection saving if their validation fails.

Use case:

I've created a custom field which is a text input. Its validation depends on the value of another select field. I use a regex inside the custom input component to validate the value, and display an error using <Field.Error />.

Currently, even when the input is visibly invalid, Strapi still allows the collection to be saved with the wrong value. This defeats the purpose of custom validation.

What I need:

I would like the ability to prevent saving a collection entry when a custom field is invalid.

This could be done by supporting a new prop in the custom field component, for example:

```const Input = forwardRef(

({ attribute, name, onChange, value, validationError }: InputProps, ref) => {```

Where validationError could be:

```{

isSaveBlocker: boolean;

errorMessage: string;

}```

Expected behavior:

If validationError.isSaveBlocker is true, the admin panel should prevent the user from saving the entry.

Optionally, the errorMessage can be shown in a global or contextual warning to explain the issue.