Adds Espresso integration, event fixes & docs on top of celo-contracts/v6.0.0--4
Full diff against OP v6.0.0: op-contracts/v6.0.0...celo-contracts/v6.0.0--5
Diff for Espresso integration, event fixes & docs: celo-contracts/v6.0.0--4...celo-contracts/v6.0.0--5
Diff for CeloSequencerFeeVault: celo-contracts/v6.0.0--3...celo-contracts/v6.0.0--4
Diff for removal of CeloSuperchainConfig: celo-contracts/v6.0.0--2...celo-contracts/v6.0.0--3
Diff for migration from CGT v1 to CGT v2: celo-contracts/v6.0.0--1...celo-contracts/v6.0.0--2
Diff for raw Celo changes on top of OP v6.0.0: op-contracts/v6.0.0...celo-contracts/v6.0.0--1