<!-- This is an auto-generated description by cubic. -->

## Summary by cubic
Make npm scripts work on Windows by replacing rm -rf with rimraf and
using cross-env for environment variables. This enables local dev and
packaging on Windows without WSL.

- **Refactors**
- Changed clean to use rimraf and delete out and scaffold/node_modules.
- Prefixed dev:engine, staging:engine, and staging:gateway with
cross-env.

- **Dependencies**
  - Added rimraf ^6.0.1. Run npm install.

<!-- End of auto-generated description by cubic. -->
Co-authored-by: 顾颢 <guhao@dayee.com>