Refactor VM volume mounting

- Replace bind-mounts on /lmn/media/$USER with separate
  mounting for Home and Share SMB shares in the VM.
- Update vm-run to start virtiofsd with /lmn/media/$USER
  (/home/$USER on localhome machines).
- Use vm-vminfo to generate a JSON file containing user
  information, including Username, Groups, printer list
  krb5-ticket and some more
- Configure vminfo.service (systemd-timer) to periodically
  call vm-vminfo.
- Ensure krb5-ticket (TGT) is injected into the Windows VM.
- Mount SMB-Home and SMB-Share shares as part of the new structure.

misc/vm/vm-update-user.ps1

@@ -0,0 +1,30 @@
+# Injects krb5-credential from .vminfo.json if available
+# 02.07.2025 da
+
+function Import-VMInfo {
+    param (
+        [string]$Path
+    )
+
+    if (Test-Path $Path) {
+        return Get-Content -Path $Path -Raw | ConvertFrom-Json
+    } else {
+        Write-Error "Fehler beim Einlesen der VMInfo Datei ($Path nicht gefunden)."
+        Write-Error "Tipp: Beim Neustart der VM wird diese Datei neu angelegt."
+        Pause
+        exit
+    }
+}
+
+$VMInfoPath = "Y:\.vminfo.json"
+
+# Schleife, die auf das Laufwerk wartet
+if (-not (Test-Path $VMInfoPath)) {
+    Write-Host "$VMInfoPath nicht gefunden. Skript beenden."
+    exit
+}
+
+# VMInfo aus JSON File einlesen
+$VMInfo = Import-VMInfo -Path $VMInfoPath
+
+& $PSScriptRoot\injector.ps1 $VMInfo.krb5.cred