Can't use fields of type "files" in settings

[lfglopes]

Description

Can't use fields of type "files" in settings.

Using the legacy settings fields the field is saved in the database with the setting identifier {$label}_{$file.id}, instead of simply $label.

Using the new system it seems it's not saved in the database at all. Steps below described using the new system:

Steps to reproduce

1. Follow the steps described here - https://twillcms.com/docs/settings-sections/index.html
2. Add a files field to site-settings.blade.php

<x-twill::files name="teste" label="Teste" />

3. Assign a file to the field
4. Save the form
5. Reload the page

Expected result

Assigned file is persisted and the field indicates the selected file

Actual result

Form field is empty

Versions

Twill version: 3.4.1
Laravel version: 9
PHP version: 8.0.30
Database engine: MySQL 8