Make the plugin build system and toolings cross-platform compatible

[thelovekesh]

The existing plugin build system and toolings are made up of different bash scripts and commands (like npm and composer scripts), which never function properly on Windows. When a developer tries to work on a project on Windows with Local WP, there may be specific use situations where some procedures don't work.

Considerable tasks include the following:

• Try to use shelljs and execute bash scripts in NodeJS.
• Explore if we can use zx by Google to keep all our scripts platform independent using NodeJS.

[westonruter]

I wonder how often this would be a problem on Windows now? Wouldn't most developers be using WSL and thus be able to use regular Linux utilities?

[thelovekesh]

Not sure how much the developer base faces this problem but I think less tech-savvy people can. In the current scenario, the npm run build:* command fails on Windows.

Check this job for instance: https://github.com/thelovekesh/amp-wp/actions/runs/4364834271/jobs/7632644049

[westonruter]

Yeah. Well, I suggest we keep this on the backlog until we have a contributor on Windows who needs this.

[thelovekesh]

SGTM