Add L3X Protocol

[michaelotis]

PR-Codex overview

This PR introduces the L3X Protocol to the project by adding l3x and l3xTestnet chains with their definitions.

Detailed summary

• Added L3X Protocol chain definitions: l3x and l3xTestnet
• Defined mainnet and testnet configurations for L3X Protocol
• Included RPC URLs and block explorer information for L3X Protocol

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[changeset-bot]

🦋 Changeset detected

Latest commit: 54e7568

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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[jxom]

Also need a changeset:

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[michaelotis]

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Added