feat: cross-chain token compatibility validation layer, hook, and integration

[Cybermaxi7]

✨ Cross-Chain Token Compatibility Validation

Overview

This PR implements a robust cross-chain token compatibility validation layer for BridgeWise, ensuring users and developers cannot attempt unsupported or invalid token transfers between Stellar and EVM networks.

Features

• Centralized Token Registry:
  • Defines supported tokens per chain and bridge in a single, extensible source.
• Validation Logic:
  • Utility function isTokenSupported(token, sourceChain, destinationChain) returns structured validation results and errors.
• SSR-Safe Hook:
  • useTokenValidation(token, sourceChain, destinationChain) hook for UI and headless integration.
• Quote Integration:
  • Validation is enforced in useBridgeQuotes to prevent fetching quotes for unsupported tokens, with clear error feedback.
• UI/Headless Ready:
  • Structured errors and validation results for both UI components and programmatic use.

Developer Experience

• Prevents unsupported or non-existent token transfers.
• Reduces failed transactions and improves UX.
• Simple API for validation in both UI and backend/headless flows.

Example Usage

const { isValid, errors } = useTokenValidation('USDC', 'Ethereum', 'Stellar');

closes #68 
closes #71