[ 🚀 Feature]: Java 18.0 runtime payload parsing is only possible as string

[zvikfir]

In the RuntimeRequest constructor in Java a casting of the payload to String is performed directly.
It enforces to send the payload as JSON string instead of sending it regularly.

For example:

POST http://localhost:3000
Content-Type: application/json
X-Internal-Challenge: secret-key

{
  "variables": {
    "DISCORD_WEBHOOK_URL": ""
  },
  "payload": "{\"type\": \"Discord\",\"message\": \"some message\"}"
}

I would expect the payload to be sent as follows:

"payload" {
  "type": "Discord",
  "message": "some message"
}

I suggest storing it as an Object and letting the function developer decide how to parse it.

[joeyouss]

Thank you for sharing this.
I added the feature label because this issue caters to improved developer experience. With next release, the body will be provided as is.
Relevant PR: #142