Ignore uncommitted files 

@jsawo would like to ignore uncommitted files during search. I would add a new method to config file, something like this:

```php
$config = new Config();

return $config->ignoreUncommittedFiles()->config();
```

or:

```php
$config = new Config(
    ignoreUncommittedFiles: true,
);

return $config->config();
```
