Add ability to automatically redirect users working folders to NC

### How to use GitHub

* Please use the 👍 [reaction](https://blog.github.com/2016-03-10-add-reactions-to-pull-requests-issues-and-comments/) to show that you are interested into the same feature.
* Please don't comment if you have no relevant information to add. It's just extra noise for everyone subscribed to this issue.
* Subscribe to receive notifications on status change and new comments.

**Is your feature request related to a problem? Please describe.**
No.

**Describe the solution you'd like**
The ability to automatically redirect common user folders like "Desktop, Documents, Pictures, Music and Videos" on Windows machines to Nextcloud folder. That way, files a user creates in those folders get automatically uploaded to the server. This way the user does not have to manually select a Nextcloud folder to save their files or move them when using programs that automatically save files in those folders. This is something that cloud also be implemented on Linux and maybe on Mac's.

**Describe alternatives you've considered**
Have to do it manually one folder at a time.

**Additional context**
This is a feature that both OneDrive and Google drive have.