List gateways

curl --request GET \
  --url https://agentgateway-admin.dev.neuraltrust.ai/v1/gateways \
  --header 'Authorization: <api-key>'

{
  "items": [
    {
      "client_tls": {},
      "created_at": "<string>",
      "domain": "<string>",
      "hosts": {
        "mcp": "<string>",
        "proxy": "<string>"
      },
      "id": "<string>",
      "metadata": {},
      "name": "<string>",
      "session_config": {
        "body_param_name": "<string>",
        "enabled": true,
        "header_name": "<string>"
      },
      "slug": "<string>",
      "status": "<string>",
      "telemetry": {
        "enable_plugin_traces": true,
        "enable_request_traces": true,
        "exporters": [
          {
            "name": "<string>",
            "settings": {}
          }
        ],
        "extra_params": {},
        "header_mapping": {}
      },
      "updated_at": "<string>"
    }
  ],
  "page": 123,
  "size": 123,
  "total": 123
}