upkeep/222: modernize developer experience

[Sidsector9]

All Submissions:

• [ ] Does your code follow the WooCommerce Sniffs variant of WordPress coding standards?
• [ ] Have you written new tests for your changes, as applicable?
• [ ] Have you successfully run tests with your changes locally?
• [ ] Will this change require new documentation or changes to existing documentation?

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Changes proposed in this Pull Request:

• Node is updated to v20.
• NPM is updated to v10.
• Node and NPM changes are reflected in the Github actions workflows.
• Build assets are generated by wordpress/scripts only.
• Entry point for all assets are moved under src/

Closes #222

Steps to test the changes in this Pull Request:

1. Pull the branch.
2. Run nvm use or nvm install depending on the situation.
3. Verify node and NPM versions by running node -v && npm -v.
4. rm -rf node_modules/.
5. npm ci && npm run build.
6. Test the plugin functionality.
7. Look for any 404 errors in console.
8. Look for any errors in the debug.log file.
9. Test the final ZIP.

Changelog entry

Dev - Update NPM packages and node version to v20 to modernize developer experience.

[qasumitbagthariya]

Regression / Smoke Test Report ✅

Tested with Archive File created via "php woorelease.phar build repo_URL" (Composer version 2.5.5, npm version 8.19.4, node version 16.20.0)

I tested the following on this branch:

• Regressing testing
• Simple product
• subscription product
• refund

Status- Working expected with Plugin Archive/Zip file same as fix specific branch.

Testing Environment

- WordPress: 6.6 - Theme: Storefront 4.6.0 - Theme: Twenty Twenty-Four 1.2 - WooCommerce - 9.1.2 - PHP: 8.0.30 - Web Server: Nginx 1.20.2 - Browser: Chrome - OS: macOS Ventura 13.3 - Git Branch: smoke-testing

Next Step- Ready to Merge 🚀

status update: cc @ankitguptaindia