Added Printing the Raw Webhook Payload to Standard Output example

[IceXPR]

This adds a minimal hook example to Hook-Examples.md for printing the raw incoming webhook payload directly to the server's console/output (visible in verbose logs).

This is particularly useful for:

• Quick testing and verification of webhook senders.
• Debugging payload content without writing custom scripts.

The example leverages pass-raw-request-body (introduced in v2.8.0) to pipe the raw body to stdin, combined with /bin/cat - to output it.

No code changes are required—pure documentation addition.

Example configuration:

[
  {
    "id": "print-payload",
    "execute-command": "/bin/cat",
    "pass-raw-request-body": true,
    "pass-arguments-to-command": [
      {
        "source": "string",
        "name": "-"
      }
    ],
    "include-command-output-in-response": true,
    "include-command-output-in-response-on-error": true
  }
]

[moorereason]

LGTM 👍