OptionalacceptThe file types accepted (optional).
OptionaladdIndicates if a message should be added.
OptionalalwaysIndicates if the action should always be performed.
OptionalmultipleWhether multiple files can be selected (optional).
OptionalresponseThe response for the file action (optional).
OptionalsendThe text for the send button (optional).
The type of the request. Value is 'file'.
FileActionRequest - Interface representing a file action request.