Get agent KB docs

curl --request GET \
  --url https://eu-voiceglow-runtime-vbmbkqccuq-ey.a.run.app/v3/agents/{agentId}/kb \
  --header 'Authorization: Bearer <token>'

{
  "success": true,
  "message": "<string>",
  "data": [
    {}
  ],
  "total": 123,
  "totalPages": 123,
  "currentPage": 123
}