feat: add Vanar Mainnet

[pk-850]

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PR-Codex overview

This PR introduces the Vanar Mainnet to the codebase, including its configuration and export within the chain definitions.

Detailed summary

• Added a new entry for Vanar Mainnet in the .changeset/neat-donkeys-train.md.
• Exported vanar from src/chains/index.ts.
• Created src/chains/definitions/vanar.ts with:
  • Chain ID: 2040
  • Name: 'Vanar Mainnet'
  • Native currency: 'VANRY' (symbol: 'VANRY', decimals: 18)
  • RPC URL: 'https://rpc.vanarchain.com'
  • Block explorer: 'Vanar Mainnet Explorer' (URL: 'https://explorer.vanarchain.com/')
  • Marked as not a testnet.

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[changeset-bot]

🦋 Changeset detected

Latest commit: 9c164ec

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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