Jaswant/showcase

[jaswantsingh09]

• Adds a new showcase artifact component to the HAX SDK for presenting browsable collections of items for users to explore, preview, and act on
• Supports 6 layout variants:
  • Grid: 3x2 vertical card grid with image, badge, heading, and description
  • List: Horizontal cards with image, content, preview button, and favorite action
  • Dense Grid: 4x3 compact grid for large collections
  • Table: Row-based table with thumbnail, title, author, category badge, and action icons
  • Categorized: Grouped sections with icon headers (Trending, Star, Clock) and overlay cards
  • Featured: Full-width hero card with 3-column masonry grid below
• Each item supports title, description, badge, image URL, author, and category fields
• Includes Zod schemas for type validation
• Exports HAXShowcase component, useShowcaseAction hook, and all related types