chore(ci): add GitHub Actions workflow for macOS and windows testing

[SoonIter]

Summary

Related issues

AI Summary

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What changes were made

• Added a new GitHub Actions workflow file .github/workflows/test-macOS.yml
• The workflow runs on macOS 14 (M1 Mac) with Node.js 22.x
• Triggers on: pull requests to main, merge groups, and manual dispatch

Workflow steps

1. Checkout - Fetches the repository code
2. Install Pnpm - Sets up corepack and enables pnpm
3. Setup Node.js - Configures Node.js with pnpm caching
4. Install Dependencies - Runs pnpm install
5. Build Packages - Runs pnpm run build
6. Unit Test - Runs pnpm run test

Why these changes were made

• To ensure the project builds and tests correctly on macOS (Apple Silicon M1)
• Provides cross-platform CI coverage for contributors using macOS
• Uses concurrency control to cancel in-progress runs on the same branch

Implementation details

• Uses latest stable versions of actions (@v4)
• Configured for the project's pnpm-based monorepo structure
• Simplified from a reference template to match this project's actual scripts

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