Backport: feat: add Superagent Guardrails to the tools registry

[vercel-ai-sdk]

This is an automated backport of #10666 to the release-v5.0 branch. FYI @homanp
This backport has conflicts that need to be resolved manually.

git cherry-pick output

Auto-merging content/tools-registry/registry.ts
CONFLICT (content): Merge conflict in content/tools-registry/registry.ts
error: could not apply 84bfff952... feat: add Superagent Guardrails to the tools registry (#10666)
hint: After resolving the conflicts, mark them with
hint: "git add/rm <pathspec>", then run
hint: "git cherry-pick --continue".
hint: You can instead skip this commit with "git cherry-pick --skip".
hint: To abort and get back to the state before "git cherry-pick",
hint: run "git cherry-pick --abort".
hint: Disable this message with "git config set advice.mergeConflict false"

[homanp]

Hey @nicoalbanese is this released or still in preview?