Add lyra chain

[radchukd]

• Add lyra chain definition
• Update chains/index.ts
• Create .changeset/bright-zoos-search.md

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PR-Codex overview

This PR adds support for the Lyra Chain, including its definition with RPC URLs, block explorers, and contracts.

Detailed summary

• Added lyra chain definition in chains/index.ts
• Defined lyra chain with ID 957, name, native currency, RPC URLs, block explorers, and contracts in chains/definitions/lyra.ts

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[changeset-bot]

🦋 Changeset detected

Latest commit: e6974b6

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

This PR includes changesets to release 1 package

Name	Type
viem	Patch

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