List documents

curl --request GET \
  --url https://api.zavu.dev/v1/senders/{senderId}/agent/knowledge-bases/{kbId}/documents \
  --header 'Authorization: Bearer <token>'

{
  "items": [
    {
      "id": "<string>",
      "knowledgeBaseId": "<string>",
      "title": "<string>",
      "contentLength": 123,
      "chunkCount": 123,
      "isProcessed": true,
      "createdAt": "2023-11-07T05:31:56Z",
      "updatedAt": "2023-11-07T05:31:56Z"
    }
  ],
  "nextCursor": "<string>"
}