feat: add coinbit mainnet

[fengbaolong]

---

PR-Codex overview

This PR introduces the Coinbit Mainnet to the codebase, adding its configuration and exporting it for use in the application.

Detailed summary

• Added Coinbit Mainnet to the project.
• Updated src/chains/index.ts to export coinbit.
• Created src/chains/definitions/coinbit.ts with:
  • Chain ID: 112
  • Native currency: GIDR
  • RPC URL: https://coinbit-rpc-mainnet.chain.sbcrypto.app
  • Block explorer: Coinbit Explorer at https://coinbit-explorer.chain.sbcrypto.app
  • Marked as not a testnet.

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

[vercel]

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

A member of the Team first needs to authorize it.

[changeset-bot]

🦋 Changeset detected

Latest commit: 4450a1d

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

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR