Add Multisig Batch utility for forge scripts

[ith-harvey]

Summary
This PR relocates MultiSigBatchBase.sol from m-portal-lite into the common package so it can be shared across repositories. Since multisig batch operations will be used across multiple projects for upgrades and related scripting tasks, centralizing this contract in common avoids duplication and ensures consistent behavior.

Motivation
MultiSigBatchBase.sol exists only in m-portal-lite, but upcoming workflows require multisig batch operations in several repos. Moving this contract into common allows all repositories to import the same implementation directly, rather than maintaining multiple copies.

Changes
• Added MultiSigBatchBase.sol to the common package
• Updated foundry.toml to ignore safe-utils lint warnings
• Imported the same version of safe-utils used in m-portal-lite (latest version introduced breaking import errors, so this PR uses the compatible release)

Next steps
remove MultisigBatchBase.sol m-portal-lite to reference the one now in common

[github-actions]

Changes to gas cost

Generated at commit: 31e80f60241b95614bc6ca36f1a34a91ec195ff0, compared to commit: 613d2d95a476612270324ecbe92317eb5e9bc98f

🧾 Summary (20% most significant diffs)

Contract	Method	Avg (+/-)	%

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Full diff report 👇

Contract	Deployment Cost (+/-)	Method	Min (+/-)	%	Avg (+/-)	%	Median (+/-)	%	Max (+/-)	%	# Calls (+/-)
ContractHelperHarness	430,744 (0)	getContractFrom	1,910 (0)	0.00%	2,112 (+1)	+0.05%	2,145 (0)	0.00%	2,192 (0)	0.00%	269 (0)
VoidDeployer	128,035 (+12)
AccountWithFallback	68,561 (-12)
AccountWithFunctionReturningInvalidData	208,424 (+12)
AccountWithoutFallback	66,854 (+12)

[github-actions]

LCOV of commit a3e30e8 during Forge Coverage #152

Summary coverage rate:
  lines......: 93.7% (433 of 462 lines)
  functions..: 93.4% (141 of 151 functions)
  branches...: no data found

Files changed coverage rate: n/a

[Oighty]

I think this is fine as an interim solution. I talked to Iryna about bumping the version to fix some of the API routes that have been deprecated on certain deployments of the Safe Transaction Service, but it may take more work with the import errors you mentioned. The safe-utils library also doesn't support all the chains. We may eventually want to find another solution or fork it and implement fixes ourselves.