Add kinto chain

[jeff-0402]

PR-Codex overview

This PR adds support for the Kinto chain by introducing a new chain definition.

Detailed summary

• Added kinto chain definition in chains/definitions/kinto.ts
• kinto chain has ID 7887 and is named "Kinto Mainnet"
• Provides RPC URLs and block explorer information
• Testnet flag set to false

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PR-Codex overview

This PR adds support for the kinto chain by including its definition in the chains module.

Detailed summary

• Added kinto chain definition to support Kinto Mainnet
• Definition includes ID, name, network, native currency, RPC URLs, block explorer details
• Testnet flag set to false

✨ Ask PR-Codex anything about this PR by commenting with /codex {your question}

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🦋 Changeset detected

Latest commit: 858f3c3

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

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