Behavior: Vagrant silent fallback to VirtualBox shared folders when NFS/SMB dependencies missing
Goal: Ensure that Vagrant notifies users when the automatically selected synced folder implementation cannot be used because required host‑side dependencies (e.g., NFS client, SMB services) are absent, causing a silent fallback to VirtualBox shared folders and potential performance loss. Constraints: Vagrant’s built‑in selection chooses NFS on macOS/Linux, S