Scripts: Use start without watcher using --no-watch

[kkmuffme]

What?

Sometimes there's a use case, where we don't want to use "npm start" with the watcher.

Why?

"npm start" directly followed by Ctrl+C, or certain CI environments that want to create unminified JS for analysis without changing the config,...

How?

• change package.json "start" to "wp-scripts start --no-watch"
• run "npm start -- --no-watch"

Testing Instructions

any gutenberg, isntead of "npm start" run "npm start -- --no-watch", which will create the unminified/dev JS without starting the watcher.

[gziolo]

Thank you for opening this PR. The change proposed makes sense 👍🏻

There are some formatting issues and running npm run format will fix them.

[gziolo]

I added an entry in the Changelog file. I need to test it locally before merging to trunk.

[gziolo]

It works correctly with --no-watch but breaks when the option is not passed:

I created a test block with:

npx wp-create-block test-block --no-wp-scripts
cd test-block

All inside the Gutenberg repository.

[kkmuffme]

Sorry for the delay, fixed now. It's ready to be merged now

[gziolo]

Thank you for addressing my feedback. I will land it as soon as I have a chance to test it again.

[kkmuffme]

@gziolo could you please check and merge this now?

[gziolo]

This tests well with the changes applied. Thank you so much.