turborepo

4828776b - fix: Add sitemap link to 404 page and fix TurborepoLogo gradient (#11655)

fix: Add sitemap link to 404 page and fix TurborepoLogo gradient (#11655) ## Summary - Added "Sitemap for agents" link to 404 page to help AI agents discover documentation - Fixed TurborepoLogo gradient not rendering due to SVG ID collisions - Updated 404 page link styling to match site design system ## Changes **404 page (`not-found-template.tsx`)**: - Added link to `/sitemap.md` for AI agent navigation - Replaced `prose` class styling with footer-consistent styles (muted foreground, hover transitions, no underlines) **TurborepoLogo (`logos.tsx`)**: - Used `React.useId()` to generate unique gradient IDs per component instance - Updated viewBox and path data to properly display gradient arcs Fixes TURBO-5195