Extend the graph teams app list command to show apps installed in the specified team

• command: graph teams app list -i|--teamId [teamId]
  (couldn't think of a better name tbh. Suggestions welcome)
• teamId: Id of the team from which to list the installed apps
• Graph API endpoint: https://docs.microsoft.com/en-us/graph/api/teamsappinstallation-list?view=graph-rest-1.0

I realised this is needed because the graph teams app uninstall command needs a unique id of the app instance installed in the team. This command can be used to list the apps currently installed in the team along with unique id of the instance.