First stable release of alloy-erc20-full.

  Based on alloy-erc20 v1.0.0 with added write
  operation support.

  Key features:
  - All alloy-erc20 features (read operations,
  caching, BigDecimal)
  - Write operations (transfer, approve,
  transferFrom)
  - Comprehensive documentation
  - Migration guide from erc20-rs
  - Full test suite and CI/CD