Documentation and samples improvements to identity for .NET 8

[JeremyLikness]

A key deliverable to improve the experience of identity management in .NET is improved documentation. Our docs should provide a comprehensive guide that empowers developers to fully understand and utilize our identity management features. Deliverables will include samples for common scenarios that follow our recommended practices for enabling and integrating authentication and authorization in .NET. This issue will serve to track individual work items that roll up to this goal.

TODO (this list will grow as we iterate on the docs)

• Entry point (Entry to make needed documentation easier to discover and navigate in fewer clicks #29461) -flow to make it easier to find the right docs
• Identity guidance (Identity guidance #29462) - new getting started experience
• Identity solutions (Identity management solutions for .NET web apps #29453) - new index of known identity management products and services
• Identity endpoints
• ASP.NET Core identity overview - changes to better visualize and navigate
• Identity concepts - conceptual overview

Samples (TBD) - right now these are examples and not committed work.

• Angular with custom Angular UI for identity admin
• React with custom React UI for identity admin
• Mobile (.NET MAUI) access using tokens
• Blazor WebAssembly Standalone - see this PR
• Blazor Web App with External Login
• ASP.NET Core Web API
• Example that uses permissions/claims and not just "is authenticated"
• LDAP/Windows login

Stretch goals

• Backend for frontend pattern for identity in .NET
• Multi-tenancy with identity in .NET

[JeremyLikness]

Please see this PR for the Blazor WebAssembly Standalone example /cc @Rick-Anderson

[Aquaritek]

Is there any movement here?

Myself and another team member have been trying to implement the following stack:

Asp.Net Core Web Api (backend identity provider to issue tokens and host api)
Blazor Web App with Interactivity per component
Blazor Hybrid Maui App

We've been going in circles for about 30 days now basically with daily scraps of all code written as it's dead end after dead end after dead end.

I should mention that we have read and re-read the entire documentation stack on authentication and security for each of the technologies above probably 3 times now and the more you ingest the more scattered you become. We're at a loss at this point.

Jokingly, we're both Mensan's but Identity Framework has us feeling like the most ignorant saps in the world. Haha!