* contracts-bedrock: Add OPSM file I/O for superchain deployments

* Update packages/contracts-bedrock/scripts/DeploySuperchain.s.sol
Co-authored-by: Matt Solomon <matt@mattsolomon.dev>

* Update packages/contracts-bedrock/test/DeploySuperchain.t.sol
Co-authored-by: Matt Solomon <matt@mattsolomon.dev>

* Address feedback from code review

* Linter

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Co-authored-by: Matt Solomon <matt@mattsolomon.dev>