docs: add leaderboards page with interactive bar charts

[matangrinberg]

• Add new Leaderboards tab with Terminal Bench, Next.js Evals, and Agent Arena benchmarks
• Create reusable BarChart and EloChart React components for visualizations
• Charts dynamically highlight Factory Droid entries in orange
• EloChart uses diverging bars centered on 1200 baseline for Elo ratings

[factory-droid]

Droid finished @matangrinberg's task —— View job

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Code Review Complete ✅

Reviewed the PR changes adding leaderboards documentation with interactive chart components.

Summary:

• Added new Leaderboards tab to docs navigation
• Created index page with tabs for Terminal Bench, NextJS Evals, and Agent Arena benchmarks
• Implemented reusable BarChart and EloChart React components

Findings:
Left 1 inline comment regarding a potential edge case in EloChart where division by zero could occur if all Elo values equal the baseline. The current hardcoded data is safe, but flagged for consideration if the component may be reused with different data in the future.

No other high-severity issues found in this documentation PR.

[Factory-AI-admin]

lgtm

[Factory-AI-admin]

lgtm