Archive XML serializer generator tool article

[gewarren]

Fixes #26253.

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Internal previews

📄 File	🔗 Preview link
docs/navigate/tools-diagnostics/toc.yml	docs/navigate/tools-diagnostics/toc
docs/standard/serialization/xml-serializer-generator-tool-sgen-exe.md	XML Serializer Generator tool (Sgen.exe)

[Copilot]

Pull request overview

This PR archives the XML Serializer Generator documentation by removing the content file and adding a redirection entry to point users to the archived version in the previous-versions site.

Key changes:

• Removes the entire xml-serializer-generator.md documentation file
• Adds a redirection entry to route traffic to the archived location

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
docs/core/additional-tools/xml-serializer-generator.md	Complete file deletion as part of archiving process
.openpublishing.redirection.json	Adds redirection rule to point archived content to previous-versions site

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The changes look appropriate for an archival operation. The redirection entry follows the same format as existing entries in the file, with the correct structure including source_path, redirect_url, and redirect_document_id fields. The redirect URL correctly points to the /previous-versions/dotnet/ site path with the appropriate subdirectory structure matching the original location.

[BillWagner]

This LGTM. Let's