feat: add zeniq chain

[fengbaolong]

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PR-Codex overview

This PR introduces the zeniq chain to the project, enhancing the chain offerings by adding its definitions and related properties.

Detailed summary

• Added a new entry for zeniq in src/chains/index.ts to export the chain definition.
• Created src/chains/definitions/zeniq.ts with the zeniq chain definition, including:
  • id: 383414847825
  • name: 'Zeniq Mainnet'
  • nativeCurrency: { name: 'ZENIQ', symbol: 'ZENIQ', decimals: 18 }
  • rpcUrls: Set to 'https://api.zeniq.network'
  • blockExplorers: Set to Zeniq Explorer with URL 'https://zeniqscan.com'
  • testnet: false

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