Blazor Web App with OIDC article

[guardrex]

Fixes #31265
Addresses #28161

You can ignore everything else on the DIFF and focus on the new article. It's in the file ...

aspnetcore/blazor/security/server/blazor-web-app-with-oidc.md

You'll see that I've only fleshed out the BFF pattern pivot completely at this point. I want to make sure that we get the original sample pivot correct first. Then, I'll cut out the bits that pertain to BFF and finish the non-BFF pattern pivot.

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Internal previews

📄 File	🔗 Preview link
aspnetcore/blazor/hybrid/security/index.md	ASP.NET Core Blazor Hybrid authentication and authorization
aspnetcore/blazor/security/server/blazor-web-app-with-oidc.md	aspnetcore/blazor/security/server/blazor-web-app-with-oidc
aspnetcore/blazor/security/webassembly/index.md	Secure ASP.NET Core Blazor WebAssembly
aspnetcore/blazor/security/webassembly/standalone-with-authentication-library.md	Secure an ASP.NET Core Blazor WebAssembly standalone app with the Authentication library
aspnetcore/blazor/security/webassembly/standalone-with-identity.md	aspnetcore/blazor/security/webassembly/standalone-with-identity
aspnetcore/blazor/state-management.md	ASP.NET Core Blazor state management
aspnetcore/fundamentals/minimal-apis/security.md	Authentication and authorization in minimal APIs
aspnetcore/security/authentication/claims.md	Mapping, customizing, and transforming claims in ASP.NET Core
aspnetcore/security/authentication/index.md	Overview of ASP.NET Core authentication
aspnetcore/security/samesite.md	aspnetcore/security/samesite

[halter73]

This looks great!