Added an AddFolder commandlet to create sub folders

I've written a powershell script to bulk upload files to SharePoint but Add-SPOFile doesn't automatically create the folder if it doesn't exist, so I wrote Add-SPOFolder to take care of this.

Here's the PowerShell where I use these two together for reference.

$path = "$dir\Main\Files"
$excludeList = @()
Get-ChildItem -Path $path -Recurse | % {
    $pathParts = $_.FullName.substring($pwd.path.Length + 1).split("\");
    if ( ! ($excludeList | where { $pathParts -like $_ } ) ) { 
		$folder = $_.FullName.Replace($path+"\", "").Replace("\"+$_.Name, "").Replace("\", "/")					
		if ($_.GetType().Name -eq "DirectoryInfo") {
			Add-SPOFolder -Name $_.Name -Folder $folder
		}
		if ($_.GetType().Name -eq "FileInfo") {			
			Add-SPOFile -Path $_.FullName -Folder $folder
		}
	} 
}