feat(frontend): implement prominent AuditBadge on project details page

[WillNovus]

Closes #118

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Added a reusable HoverCard component and a specialized AuditBadge to display smart contract audit status and security metrics, building trust in the decentralized protocol.

Frontend Updates

• HoverCard (src/components/ui/HoverCard.tsx):
  • Built a generic hover-card UI utilizing Tailwind CSS and Framer Motion for smooth enter/exit micro-animations.
• AuditBadge (src/components/AuditBadge.tsx):
  • Implemented the badge displaying mock audit metadata (security score, risk findings breakdown, conclusion).
  • Included a link to the full decentralized audit report for transparency.
• Project Detail Page (src/app/project/[id]/page.tsx):
  • Integrated the AuditBadge prominently into the project header pill container alongside the project category and milestones tracker.

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