New command: get information about an Office 365 group #306

Get information about the specified Office 365 group

• command: graph o365group get -i|--id <id> --includeSiteUrl
• id: the ID of the Office 365 group to retrieve information for
• includeSiteUrl: include the URL of the Office 365 group site
• requires connection to the Microsoft Graph (Add support for authenticating to MS Graph #10)

For more information see the Get-PnPUnifiedGroup cmdlet