[.NET 10] Add .NET MAUI Blazor Hybrid sample using Entra workforce ID

Add a complete .NET MAUI Blazor Hybrid + ASP.NET Core Web App sample
that authenticates against a Microsoft Entra workforce (business)
tenant using MSAL.NET and Microsoft.Identity.Web.

Three projects:
- MauiBlazorWebEntraWorkforce: MAUI app (Android, iOS, Mac Catalyst, Windows)
- MauiBlazorWebEntraWorkforce.Shared: Razor Class Library with shared UI
- MauiBlazorWebEntraWorkforce.Web: ASP.NET Core Blazor Server web app + API

Includes:
- Interactive setup/teardown PowerShell scripts for Azure app registrations
- Dual auth: OIDC+Cookie for web, JWT Bearer for MAUI API calls
- WAM broker integration on Windows for SSO
- Mac Catalyst workaround using ASWebAuthenticationSession
- SecureStorage token cache persistence on Windows and Mac Catalyst

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: mattleibow

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