feat: add get swap quote for token

[alexohre]

🚀 Enhanced AutoSwap SDK: StarkNet v7 Migration & Quote System

📋 Summary

This PR introduces significant improvements to the AutoSwap SDK, bringing it up to modern StarkNet standards and adding essential trading functionality that users have been requesting.

✨ What's New

🔄 StarkNet v7.6.4 Migration

• Upgraded from StarkNet v5.19.5 → v7.6.4 for better performance and compatibility
• Gas fees now default to STRK tokens instead of ETH, aligning with StarkNet's latest fee structure
• Enhanced transaction reliability with improved RPC provider configuration
• Better error handling for network-related issues

💰 Smart Quote System

• Added getSwapQuote() method - finally! Users can now preview swap rates before executing
• Real-time price estimation using live Ekubo pool data
• Comprehensive quote details including:
  • Expected output amounts
  • Exchange rates (e.g., "1 USDC = 7.84 STRK")
  • Price impact calculations
  • Pool fees and gas estimates
• Dynamic gas estimation based on swap complexity and token types

🛠️ Developer Experience Improvements

• Enhanced error handling with detailed, actionable error messages
• Better TypeScript support with improved type definitions
• Comprehensive logging for debugging swap calculations
• Input validation to prevent common user errors