Resource-based authz article overhaul

[guardrex]

Fixes #35818

Notes

• I rewrote the introductory remarks.
• The MVC and RP versions of the article remain mostly unchanged with minor updates here and there.
• The revamped main article, which now adopts Razor component/Blazor examples, is fleshed out with a bit more code and details to make concepts clearer. Also, the examples are less hacked. For example, the sample app actually has mock, seeded documents. I think that we're ok to focus the most significant upgrades in coverage on the main article.
• WRT the MVC and RP code examples and sample app, I leave most of the code examples pulled from the MVC/RP sample apps. I've temporarily left some links the code inlined in the article text. I'll pull the HTML comments before merging this. I don't think we should provide a new MVC/RP sample. It seems unlikely that this code will change, and creating yet another sample seems like 💸. However, let me know if you want me to do that, and I'll get right on it.
• The Blazor sample is here 👉 https://github.com/dotnet/AspNetCore.Docs.Samples/tree/main/security/authorization/BlazorWebAppAuthorization.

NOTE TO SELF 🦖

Kill the MVC/RP samples living in the docs repo before merging this PR. They were moved to the samples repo 👉 https://github.com/dotnet/AspNetCore.Docs.Samples/tree/main/security/authorization/resource-based.

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Internal previews

📄 File	🔗 Preview link
aspnetcore/mvc/security/authorization/resource-based.md	aspnetcore/mvc/security/authorization/resource-based
aspnetcore/razor-pages/security/authorization/resource-based.md	aspnetcore/razor-pages/security/authorization/resource-based
aspnetcore/security/authentication/index.md	aspnetcore/security/authentication/index
aspnetcore/security/authorization/resource-based.md	aspnetcore/security/authorization/resource-based
aspnetcore/security/authorization/views.md	aspnetcore/security/authorization/views
aspnetcore/signalr/authn-and-authz.md	aspnetcore/signalr/authn-and-authz
aspnetcore/toc.yml	aspnetcore/toc

[Copilot]

Pull request overview

This PR renames and restructures the resource-based authorization documentation so the main article targets Blazor/Razor component scenarios, while adding separate MVC and Razor Pages companion articles and updating repo links/navigation to the new UID/path.

Changes:

• Replaced the old general resource-based authorization article with a new resource-based.md article focused on Blazor examples.
• Added new MVC and Razor Pages resource-based authorization articles and surfaced them in the TOC.
• Updated inbound links and added a redirection from the old resourcebased.md path.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 11 comments.

Show a summary per file

File	Description
aspnetcore/toc.yml	Adds TOC entries for the new MVC/Razor Pages articles and updates the main authorization article UID.
aspnetcore/signalr/authn-and-authz.md	Updates related-resource links to the renamed resource-based authorization article.
aspnetcore/security/authorization/views.md	Updates imperative-authorization links to the renamed article and new section anchor.
aspnetcore/security/authorization/resourcebased.md	Deletes the old resource-based authorization article.
aspnetcore/security/authorization/resource-based.md	Adds the new main resource-based authorization article focused on Blazor scenarios.
aspnetcore/security/authentication/index.md	Repoints challenge/forbid references to the renamed resource-based authorization article.
aspnetcore/razor-pages/security/authorization/resource-based.md	Adds the new Razor Pages-specific resource-based authorization article.
aspnetcore/mvc/security/authorization/resource-based.md	Adds the new MVC-specific resource-based authorization article.
.openpublishing.redirection.json	Adds a redirect from the old article path to the new one.

[Copilot]

Pull request overview

Copilot reviewed 9 out of 9 changed files in this pull request and generated 7 comments.