[Messenger] dispatch MessageDetailsEvent to allow customization of message details generation

[jdreesen]

Q	A
Bug fix?	no
New feature?	yes
BC breaks?	no
Deprecations?	no

Currently, the “Details” modal only contains a print_r of the message. Sometimes, however, it is desirable to present the content better. For this purpose, a MessageDetailsEvent has been introduced, which can be used to manipulate the displayed data.

Here is an example for a message that contains XML:

#[AsEventListener('coreshop.messenger.message_details')]
class MyMessageDetailsListener
{
    public function __invoke(MessageDetailsEvent $event): void
    {
        if ('my_receiver' === $event->getReceiverName()) {
            $xml = $event->getEnvelope()->getMessage()->xml;

            $event->getMessageDetails()->setSerialized('<pre>'.htmlentities($xml).'</pre>');
        }
    }
}

[github-actions]

All contributors have signed the CLA ✍️ ✅
_{Posted by the CLA Assistant Lite bot.}

[jdreesen]

I have read the CLA Document and I hereby sign the CLA

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[dpfaffenbauer]

@jdreesen thank you very much :)