Remove AzureADPreview dependency Windows 365 Cloud PC Usage Report

[MietekW]

First thanks for time and effort spent for providing these scripts.
I am to time constraint to do a PR for this so I hope it is ok, to share it via this post.

I am not able to share my script as I use DevOPS so removed 85% of the code for the [Windows 365 Cloud PC Usage Report] script.

Some things that I encountered or changed.
The current version check for the mggraph version does not work, as it does a compare on a string value for version(not on a integer), so this has no added benefit.
I would suggest to remove this or rewrite it so it does upgrade or ask for a upgrade, no added benefit with the current check as the scripts continues to work.

The second is I do not like to be using the AzureADpreview module, so I replaced the line:
$Logons = Get-AzureADAuditSignInLogs -Filter "startswith(userPrincipalName,'$($CloudPCUser.UserPrincipalName)') and appdisplayname eq 'Windows Sign In' and createdDateTime gt $string"

With:
$Logons = Get-MgAuditLogSignIn -Filter "startsWith(userPrincipalName,'$($CloudPCUser.UserPrincipalName)') and appdisplayname eq 'Windows Sign In' and createdDateTime gt $string"

And removed all lines of code that were needed for the AzureADpreview connection.
This way it 100% uses the mggraph modules.

The code below does not work as the variable $total is never set $count should be used.

Line 255
if ($total -eq 0) { write-host "User has not logged in." -ForegroundColor Red }

I rewrote that to this so it also writes an entry that no logons were found in the past $offset days.

    #Counts each web logon
    foreach ($Logon in $Logons) {

        if (($Logon.UserPrincipalName -eq $CloudPCUser.UserPrincipalName) -and ($Logon.DeviceDetail.Displayname -like "CPC-*") -and ($Logon.DeviceDetail.DeviceID -eq $CloudPCUser.AadDeviceId)) {
            $count = $count + 1

            if ($logon.CreatedDateTime -gt $LastLogon) { $LastLogon = $Logon.CreatedDateTime }    
             #outputs local client logon count
    write-host "Logon count is $count"
    $output.Logons = $count

    #outputs the last logon time
    write-host "User's last logon time is(UTC)"$LastLogon
    $output.LastLogon = $LastLogon
        }
    }
    #outputs notification if no logon activity has been recorded
    if ($count -eq $null) {
        
        $count = 0
        write-host "No logons found in past $offset days."
        $output.Logons = $count
        $output.LastLogon = "No logons found in past $offset days."
    }