[WIP] update: Abstract testnet EIP712 domain

[cygaar]

The default domain name for zk stack chains right now is zkSync. However, on Abstract, we want the domain name to be Abstract. This PR changes the network configuration to default to Abstract.

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PR-Codex overview

The focus of this PR is to add a new function getAbstractEip712Domain and update abstractTestnet chain configuration with a custom EIP712 domain.

Detailed summary

• Added getAbstractEip712Domain function to generate EIP712 domain for Abstract chain
• Updated abstractTestnet chain configuration to use the new EIP712 domain function

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[changeset-bot]

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Latest commit: 29b6f7e

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[vercel]

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[jxom]

superseded by #2709