[NFR] JsonSerializable for all Message classes

[grigoriy-ivanov]

It will make code more simple when we are sending json response.
At the moment:

$messages = $robot->getMessages();
foreach ($messages as $message) {
    $response[] = $message->getText();
 }
$request->setJsonContent($response);

I would like to:

$messages = $robot->getMessages();
$request->setJsonContent($messages);

P.S. Phalcon has two different MessageInterfaces. Maybe should are be merged into one?

[sergeyklay]

Could you please open a separated issue related to the MessageInterface

[grigoriy-ivanov]

Yes. of course. #13114

[stale]

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