Create Folder

POST /upload/createfolder

curl -X POST http://localhost:3000/upload/createfolder \
  -H "Authorization: Bearer <api_key>" \
  -F "folder=products/2024"

{
  "success": true,
  "folder": "uploads/2024",
  "error": null
}

{
  "success": false,
  "folder": null,
  "error": "Folder already exists"
}