feat(offchain-manager): implement setDefaultEvmAddress method

[HAPPYS1NGH]

🚀 Feature: Set Default EVM Address Method

Summary:
Added a new setDefaultEvmAddress method to the offchain-manager package that allows users to set the same EVM address across all EVM-compatible chains with a single method call.

Key Changes:

• ✨ New Method: setDefaultEvmAddress(subname, address)
• 🔗 EVM Chain Support: Automatically sets address for 17 EVM-compatible chains:
  • Ethereum, Arbitrum, Optimism, Base, Polygon, BSC, Avalanche, Gnosis, zkSync, Linea, Scroll, Unichain, Berachain, WorldChain, Zora, Celo, and Monad
• 📚 Enhanced Documentation: Updated README with usage examples
• 🧪 Example Integration: Added to basic-usage.ts example
• 🏷️ Chain Metadata: Added evm flag to chain metadata for EVM compatibility identification

Technical Implementation:

• Uses existing _setDefaultEthereumAddress private action
• Leverages chain metadata filtering to identify EVM-compatible chains
• Maintains backward compatibility with existing address record methods
• Includes proper TypeScript types and JSDoc documentation

Benefits:

• 🎯 Simplified UX: One method call instead of 17 individual calls
• ⚡ Performance: Batch operation for better efficiency
• 🔒 Consistency: Ensures same address across all EVM chains
• 📖 Developer Experience: Clear documentation and examples

Files Modified:

• packages/offchain-manager/src/offchain-client/index.ts - Added public method
• packages/offchain-manager/src/offchain-client/private-actions.ts - Added private implementation
• packages/offchain-manager/src/dto/chains.ts - Enhanced chain metadata
• packages/offchain-manager/README.md - Updated documentation
• packages/offchain-manager/examples/basic-usage.ts - Added usage example

[HAPPYS1NGH]

Changelog (if want to publish)

[1.0.8] - 2025-10-21

Added

• Set Default EVM Address Method: Added setDefaultEvmAddress method to set a default EVM address for all EVM-compatible chains
• Enhanced Chain Metadata: Added evm flag to chain metadata to indicate EVM compatibility for various chains
• Comprehensive EVM Support: Method automatically sets address for 17 EVM-compatible chains (Ethereum, Arbitrum, Optimism, Base, Polygon, BSC, Avalanche, Gnosis, zkSync, Linea, Scroll, Unichain, Berachain, WorldChain, Zora, Celo, and Monad)

Enhanced

• Developer Experience: Updated README.md with usage examples for the new setDefaultEvmAddress method
• Documentation: Added comprehensive JSDoc documentation with examples
• Examples: Updated basic-usage.ts to demonstrate the new functionality

[nenadmitt]

Nice