Add Rootstock Testnet chain

[jonathansmirnoff]

PR-Codex overview

This PR adds support for the Rootstock Testnet chain.

Detailed summary

• Added Rootstock Testnet chain to the list of supported chains.
• Added definition for the Rootstock Testnet chain.
• Defined chain ID, name, network, native currency, RPC URLs, block explorers, and contracts for Rootstock Testnet.

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PR-Codex overview

This PR adds support for the Rootstock Testnet chain, including definitions and configurations.

Detailed summary

• Added rootstockTestnet chain definition
• Updated chains/index.ts to export rootstockTestnet
• Created rootstockTestnet.ts with chain configuration
• Added Rootstock Testnet chain to the project

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[changeset-bot]

🦋 Changeset detected

Latest commit: 0f8c922

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

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viem	Patch

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[jxom]

Thanks for the PR! I had to remove the multicall contract as it was unverified. Feel free to open another PR with a verified contract.

[jonathansmirnoff]

Thanks for the PR! I had to remove the multicall contract as it was unverified. Feel free to open another PR with a verified contract.

Thanks for your review. I will be working trying to verify the contract!