signTypedData implementation + tests + nexus contracts update

[VGabriel45]

PR-Codex overview

This PR updates contract ABIs, test addresses, and Nexus chain name for better integration and testing.

Detailed summary

• Updated contract ABIs for MockHook, MockValidator, EIP1271, K1Validator, and Nexus
• Changed test addresses for various modules
• Updated Nexus chain name to anvil-51139

The following files were skipped due to too many changes: src/__contracts/abi/NexusAbi.ts, tests/src/__contracts/mockAddresses.ts, src/account/NexusSmartAccount.ts, src/account/utils/Utils.ts, tests/src/__contracts/abi/TokenWithPermitAbi.ts, tests/account.read.test.ts

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[github-actions]

size-limit report 📦

Path	Size
core (esm)	16.78 KB (+5.93% 🔺)
core (cjs)	22 KB (+4.78% 🔺)
bundler (tree-shaking)	4.72 KB (+1.97% 🔺)
paymaster (tree-shaking)	2.42 KB (0%)