Project Restructuring: Separate Contracts, Frontend, and Backend

[oumaoumag]

Description

This PR restructures the SuiRides application into three distinct components:

1. Contracts - Sui Move smart contracts for ride management
2. Frontend - Existing Expo/React Native application
3. Backend - New Node.js API service for blockchain interaction

Changes Made

• Created a contracts directory with Sui Move package structure
• Migrated existing Expo app into the frontend directory
• Established a new backend directory for API services
• Updated Docker configuration to support all three components
• Added TypeScript configurations for proper type support
• Fixed Node.js type definitions in backend services

Additional Notes

This restructuring provides better separation of concerns and allows each component to be developed and deployed independently while maintaining clear contracts between them.