add unichain support

[YouStillAlive]

closes #192

[Copilot]

Pull Request Overview

Adds support for the Unichain network by defining its chain configuration and registering it alongside other chains.

• Introduces a new UnichainConfig with network details and deployed contract addresses
• Imports and registers UnichainConfig in the global AVAILABLE_CHAINS map

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
src/contracts/configs/Unichain.config.ts	New chain config for Unichain (IDs, RPC, Explorer, contracts)
src/constants/index.ts	Import and registration of UnichainConfig in AVAILABLE_CHAINS

Comments suppressed due to low confidence (3)

src/contracts/configs/Unichain.config.ts:16

• [nitpick] The explorer name uses inconsistent capitalization. Consider renaming to "Unichain Pacific Explorer" to match the naming style of other chain configs.

        name: "unichain-pacific Explorer",

src/constants/index.ts:19

• There’s no accompanying documentation or README update announcing Unichain support. Consider updating the project docs to list Unichain among the supported chains.

import { UnichainConfig } from "../contracts/configs/Unichain.config"

src/constants/index.ts:42

• No tests have been added to verify that UnichainConfig is registered correctly. Consider adding a unit test to ensure it appears in AVAILABLE_CHAINS with the expected settings.

AVAILABLE_CHAINS.set(130, UnichainConfig)