Add getlibraryshare script

scripts/GetLibraryShare.ps1

@@ -0,0 +1,10 @@
+param()
+try {
+  $ls = Get-SCLibraryShare | Where-Object { -not $_.IsViewOnly -and -not $_.MarkedForDeletion } | Select -First 1
+  if (-not $ls) {
+    throw "no library share found"
+  }
+  return @{ Result = "$($ls.Path)" } | convertto-json
+} catch {
+  ErrorToJson 'Get LibraryShare' $_
+}