PayloadFactory should have more creation methods.

Shouldn't the `Aura\Payload\PayloadFactory` have more methods; especially when creating payloads of different statuses.

E.g.

```php
$foundPayload = $this->payloadFactory->found()->setOutput(...);

$notFoundPayload = $this->payloadFactory->notFound()->setMessages(['Resource is missing.']);
```

I can write the PR if you do want this functionality.