[Frontend] Build ShipmentCard Component

[mftee]

Description:
Create a ShipmentCard reusable component used in the shipments list, marketplace, and dashboard recent-shipments grid. Clicking anywhere on the card navigates to the shipment detail page.

Create frontend/components/shipment/shipment-card.tsx.

Acceptance Criteria:

• 'use client' directive
• Accepts shipment: Shipment prop
• Entire card is wrapped in a <Link href={/shipments/${shipment.id}}> with hover shadow effect
• Displays: trackingNumber (monospace, small), origin → destination (bold), StatusBadge, cargo description (2-line truncate), weight in kg, volume in m³ (if present), formatted price using Intl.NumberFormat
• Shows estimated delivery date if present, formatted as "ETA: Mar 5, 2025"
• Uses Card, CardHeader, CardContent from the UI library
• StatusBadge aligned to top-right of the header