Create group channel

curl --request POST \
  --url http://localhost:3000/api/messaging/group-channels \
  --header 'Content-Type: application/json' \
  --data '{
  "name": "<string>",
  "participants": [
    "3c90c3cc-0d44-4b50-8888-8dd25736052a"
  ],
  "description": "<string>"
}'

{
  "success": true,
  "data": {
    "channel": {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "name": "<string>",
      "serverId": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
      "type": "text",
      "description": "<string>",
      "metadata": {}
    }
  }
}