feat: add alienx chain

[tom-jordan1]

PR-Codex overview

This PR introduces support for the AlienX blockchain by adding both the mainnet and a testnet configuration. It includes new exports and definitions for the alienx and alienxHalTestnet chains.

Detailed summary

• Added alienx mainnet definition in src/chains/definitions/alienX.ts.
• Added alienxHalTestnet definition in src/chains/definitions/alienXHalTestnet.ts.
• Updated src/chains/index.ts to export alienx and alienxHalTestnet.

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PR-Codex overview

This PR introduces the AlienX blockchain and its testnet, ALIENX Hal Testnet, into the project, allowing for integration with these new chains.

Detailed summary

• Added AlienX chain to src/chains/index.ts.
• Created alienX.ts defining AlienX Mainnet with its properties.
• Created alienXHalTestnet.ts defining ALIENX Hal Testnet with its properties.

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🦋 Changeset detected

Latest commit: f7a473e

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

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