docs: update Red Teaming documentation to match current API

[Aryansharma28]

Summary

• Re-adds the Red Teaming docs (reverted in revert docs #272) updated to match the current API after feat: backtracking on hard refusals for RedTeamAgent #270 and feat: add backtracking on hard refusals for RedTeamAgent (TypeScript) #271
• Fixes Python param name: fast_refusal_detection (was incorrectly detect_refusals)
• Removes non-existent max_backtracks/backtrack_threshold config params — backtracking triggers on hard refusals with a fixed limit of 10
• Early exit and backtracking are now documented for both Python and TypeScript
• Updates config reference table and all code examples to match actual implementations

Supersedes #265 (merged then reverted in #272).

Test plan

• Verify docs build locally with cd docs && pnpm dev
• Check all Python code examples match red_team_agent.py signatures
• Check all TypeScript code examples match red-team-agent.ts signatures

🤖 Generated with Claude Code

[github-actions]

Automated low-risk assessment

This PR was evaluated against the repository's Low-Risk Pull Requests procedure.

• Scope: Adds Red Teaming documentation (docs/pages/advanced/red-teaming.mdx) and a navigation entry (docs/vocs.config.tsx); documentation and example updates only, no runtime/security/config changes.
• Exclusions confirmed: no changes to auth, security settings, database schema, business-critical logic, or external integrations.
• Classification: low-risk-change under the documented policy.

The PR only adds a new documentation page (red-teaming.mdx) and updates the docs navigation (vocs.config.tsx) — it does not modify authentication, secrets, database schemas, business logic, or external integrations. All changes are documentation and site configuration only, which fits the allowed low-risk categories.

This classification allows merging without manual review once all required CI checks are passing and branch protection rules are satisfied.