[Feat]: Add `disable-folder-downloads`

## What is your suggestion?
1. `disable-file-downloads` prevents all forms of downloading
2. I would like to disable downloading of whole folders only but allow downloading of 1 file

## Why do you want this feature?
My aim is to not allow whole folder downloads as it can lead to bad practices/security issues but downloading of files, 1 by 1 is acceptable as a convenience feature

## Are there any workarounds to get this functionality today?
Yes, allow file downloads which also allows folder downloads

## Are you interested in submitting a PR for this?
Unfortunately no as my javascript is subpar.

Empieza por encontrar la configuración existente `disable-file-downloads` y la ruta de código que gestiona las descargas de carpetas. Confirma en qué se diferencian las descargas de archivos individuales de las descargas de carpetas completas y, después, actualiza el comportamiento de la configuración para que las descargas de carpetas queden bloqueadas, mientras que las descargas de archivos individuales sigan disponibles.

Escrito por el modelo de indexación a partir del texto del issue.