[Migration] Migrate AddressBook to shadcn registry (#1)

[PetarStoev02]

Summary

• Migrates the AddressBook component to shadcn registry format
• Creates the foundational registry structure for w3-kit components
• Component can now be installed via npx shadcn@latest add @w3-kit/address-book

Changes

• New Files:
  • registry/w3-kit/address-book/address-book.tsx - Main component (refactored)
  • registry/w3-kit/address-book/types.ts - TypeScript interfaces
  • registry/w3-kit/address-book/utils.ts - Utility functions and constants
  • registry.json - shadcn registry manifest
  • components.json - shadcn configuration

Component Structure

registry/w3-kit/address-book/
├── address-book.tsx    # Main component
├── types.ts            # TypeScript interfaces
└── utils.ts            # Utilities and constants

Installation

npx shadcn@latest add @w3-kit/address-book

Test plan

• Verify registry.json is valid JSON
• Verify component exports work correctly
• Test component renders in isolation
• Verify dark mode support
• Test all CRUD operations (Add, Edit, Delete)

Closes #1