[Docs Site] New schema value for Support AI

[kodster28]

Summary

In addition to noindex behavior used in places like #22758, we need a bit more nuance / flexibility for de-emphasizing certain pages.

This should still be applied cautiously, b/c the deprioritization needs to be assumed in whatever context someone might be asking questions to the chatbot.

A good, current example of this would be /firewall/, where the feature is deprecated but we don't want it fully hidden from Google / our search. A bad example would be something like /pages/, where we're trying to recommend folks use Workers Assets but Pages is still a valid way of accomplishing your actions.

Part of the rollout (and testing) related to #22754.

PCX-17631

[github-actions]

This pull request requires reviews from CODEOWNERS as it changes files that match the following patterns:

Pattern	Owners
*.astro	@cloudflare/developer-advocacy, @kristianfreeman, @kodster28, @pedrosousa, @haleycode, @GregBrimble, @KianNH, @WalshyDev
*.ts	@cloudflare/developer-advocacy, @kristianfreeman, @kodster28, @pedrosousa, @haleycode, @GregBrimble, @KianNH, @WalshyDev

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PR Change Summary

Enhanced the documentation for the Cloudflare Firewall Rules by introducing a new schema value to improve the handling of deprecated features in chatbot responses.

• Added 'chatbot_relevant: false' to the Cloudflare Firewall Rules documentation to indicate its deprioritization in chatbot responses.
• Clarified the approach for managing deprecated features in the documentation context.
• Aligned the documentation strategy with the ongoing rollout and testing efforts.

Modified Files

• src/content/docs/firewall/index.mdx

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[github-actions]

Preview URL: https://13114dd6.preview.developers.cloudflare.com
Preview Branch URL: https://chatbot-frontmatter.preview.developers.cloudflare.com

[KianNH]

/windsurf-review