- Start-IntuneToolkit.ps1 now shows a tenant picker as the first step
when -TenantId is not provided.
- Lists saved tenants from Settings.json, attempting to display cached
tenant names alongside GUIDs.
- Offers '[+ Onboard new tenant]' option for entering new tenants.
- Automatically resolves unknown tenant names via Graph /organization
and caches them back to Settings.json for future use.