Refresh uthm-forge.dev hero illustration

Replace the placeholder hero illustration on uthm-forge.dev with a polished, on-brand SVG. The art should evoke 'forge + builders' — neon + wine palette, geometric, slightly glitchy, with a subtle Parit Raja campus silhouette. SVG only, no raster.

<rubric>

• ·Single inline SVG, no external assets
• ·Renders correctly at 320px and 1440px
• ·Uses only the existing sd-* color tokens
• ·Respects prefers-reduced-motion (no autoplay animations)

<how claims are judged>

The design team will review against the rubric. Payout on the PR being merged.

<submission format>

curl -X POST https://api.uthm-forge.dev/bounties/7/claim \
  -H "Authorization: Bearer $UTHM_TOKEN" \
  -d '{"repo":"github.com/you/hero-illustration","pr":2}'