### Is there an existing issue for this?

- [X] I have searched the existing issues

### Feature description

I would like to request extending `sns_listener` with an ability to understand `email-json` next to `email` protocol.

### 🧑‍💻 Implementation

1. check if protocol is `email` or `email-json`
2. for email json interpret body/message as json

### Anything else?

_No response_
sns_error_to_dead_letter_queue(subscriber["SubscriptionArn"], req_data, str(exc))
        return
    elif subscriber["Protocol"] in ["http", "https"]:
        msg_type = (req_data.get("Type") or ["Notification"])[0]
        try:
            message_body = create_sns_message_body(subscriber, req_data, message_id)
        except Exception:
            return
        try:
            response = requests.post(
                subscriber["Endpoint"],
                headers={
                    "Content-Type": "text/plain",
                    
                    
                    "x-amz-sns-message-type": msg_type,
                    "x-amz-sns-topic-arn": subscriber["TopicArn"],
                    "x-amz-sns-subscription-arn": subscriber["SubscriptionArn"],
                    "User-Agent": "Amazon Simple Notification Service Agent",
                },
                data=message_body,
                verify=False,
            )
            delivery = {
                "statusCode": response.status_code,
                "providerResponse": response.get_data(),
            }
            store_delivery_log(subscriber, True, message, message_id, delivery)
            response.raise_for_status()
        except Exception as exc: