refactor: adderss <-> bytes32

[gwalen]

summary of conversions
toBytes32
• AppGatewayBase.sol: setAddress, callback of deploy
• DeployForwarder.sol: appg address in deployContract
• Forwarder.sol: getOnChainAddress, old address compatibility (temporary)
• Configurations.sol: appg in verifyConnections — appg can be in address format in plugConfig; watcher-processor should convert it when setting
• Socket.sol: sb in payloadId creation
• Socket.sol: plug, sb in triggerEvent
• SocketUtils.sol: socket, target in digest creation
• WritePrecompile: appg in digest creation

toAddress
• Trigger.sol: appg address — can be handled in watcher-processor

📝 Notes
• Configurations.sol and Trigger.sol can be updated, but there’s no immediate need for action.
• Let’s merge and add comments to revisit these later.