upkeep/110: 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 #110

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.

[dkotter]

Left a handful of comments but in testing, things seemed to work great. I see we're changing the textdomain in lots of JS files from woocommerce-square to just woocommerce. I left a handful of comments on this but then decided to quit flagging it. If this isn't intentional, we should change those back. If there is a reason why, would be curious to know.

Also, E2E tests are failing on this PR. Not sure it's related but would be great to get those fixed up so we can be confident these updates aren't causing problems.

[Sidsector9]

@dkotter the tests are passing locally in the first pass:

I'll investigate why it is failing in pipeline.

[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)

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

Next Step- Ready to Merge 🚀