Group Folder Sync Connections by User/Server

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## Feature request

**Which Nextcloud Version are you currently using: **4.0.2**

**Is your feature request related to a problem? Please describe.**
We dont like having all the Folder Sync Connections sitting as individual namespaces in explorer. Something like sharepoints document library system would be nice.

**Describe the solution you'd like**
Group Folder Sync Connections under one namespace e.g. "User - Server"

**Describe alternatives you've considered**
We have to map all team folders separately due to their size and the limitations of the current VFS system for windows.