feat: change klaytn to kaia chain

[0oooooooo0]

This Pull Request proposes the rebranding of the Klaytn Chain to the Kaia Chain, effective from August 29th. The changes include the following:

All instances of "Klaytn" have been updated to "Kaia" throughout the codebase and documentation.
The KlaytnBaobab testnet has been renamed to "Kairos." All references to "KlaytnBaobab" have been updated accordingly.
Please review the changes and provide feedback. If everything is in order, I would appreciate it if this PR could be merged by or before August 29th to ensure a smooth transition.

For more details about the chain rebranding, please refer to the official announcement here.

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PR-Codex overview

The focus of this PR is to add support for the Kaia chain and deprecate klaytn in favor of kaia and kairos.

Detailed summary

• Added Kaia chain with details
• Deprecated klaytn, use kaia instead
• Added kairos chain
• Updated klaytn and klaytnBaobab chains with new details

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

[changeset-bot]

🦋 Changeset detected

Latest commit: c10ea8e

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

This PR includes changesets to release 1 package

Name	Type
viem	Patch

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[vercel]

@0oooooooo0 is attempting to deploy a commit to the Wevm Team on Vercel.

A member of the Team first needs to authorize it.

[jxom]

Suggested change

	export const kaia = /*#__PURE__*/ defineChain({
	export const klaytn = /*#__PURE__*/ defineChain({

[jxom]

Suggested change

	export const kairos = /*#__PURE__*/ defineChain({
	export const klaytnBaobab = /*#__PURE__*/ defineChain({

[jxom]

To avoid breaking changes, can you please keep the original exports for these chains under a /** @deprecated */ flag and also add new files for the new chains? We can keep the rebranding in the old chains too.

Example:
https://github.com/wevm/viem/blob/main/src/chains/index.ts#L226-L227

[0oooooooo0]

To avoid breaking changes, can you please keep the original exports for these chains under a /** @deprecated */ flag and also add new files for the new chains? We can keep the rebranding in the old chains too.

Example: https://github.com/wevm/viem/blob/main/src/chains/index.ts#L226-L227

I completed it! thank you

[0oooooooo0]

@jxom Do you check it? Kaia will launch after 2 days. so I hope it merges quickly