ajout readme + début des tests

utils/dev-note.txt

@@ -1,20 +1,4 @@
 Get-ExecutionPolicy
 
 Set-ExecutionPolicy Unrestricted
-Set-ExecutionPolicy Restricted
-
-Install powershell 7 from powershell 5 : 
-iex "& { $(irm https://aka.ms/install-powershell.ps1) } -UseMSI"
-
-
-foreach ($u in $users)
-{
-Write-Host $u.Name -ForegroundColor Green
-$cal = Get-MailboxFolderStatistics $u.Identity -FolderScope Calendar | Where-Object {$_.Name -in @("Agenda", "Calendar", "Calendrier", "Kalender")}
-
-foreach ($c in $cal)
-{
-Write-Output $c.Name
-}
-
-}
+Set-ExecutionPolicy Restricted