Add bridge setup deployment script

[poszu]

Summary

• Adds deploy/03_BridgeSetup.sol script that configures the bridge and waitlist post-deployment:
  • Grants RELAYER_ROLE on the bridge to the waitlist contract
  • Approves tokens on the waitlist for bridge transfers
  • Updates validator config: keeps existing resilience and version, adds real validators, removes admin

Usage

forge script deploy/03_BridgeSetup.sol:BridgeSetup \
  --sig "run(address,address,address[],address[])" \
  <BRIDGE_PROXY> <WAITLIST> "[<TOKEN1>,<TOKEN2>]" "[<VALIDATOR1>,<VALIDATOR2>]" \
  --rpc-url $RPC_URL \
  --private-key $PRIVATE_KEY \
  --broadcast

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