List all agents

curl --request GET \
  --url http://localhost:3000/api/agents

{
  "success": true,
  "data": {
    "agents": [
      {
        "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "name": "<string>",
        "status": "active"
      }
    ]
  }
}