feat: add dev script for previewing changes

[TusharThakur04]

Summary
This PR adds a dev script for previewing changes in dev environment

What kind of change does this PR introduce?
feat

Did you add tests for your changes?
no

Does this PR introduce a breaking change?
no

If relevant, what needs to be documented once your changes are merged or what have you already documented?

Use of AI

[vercel]

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Project	Deployment	Actions	Updated (UTC)
webpack-doc-kit	Ready	Preview	Jul 31, 2026 5:08pm

[avivkeller]

Running npx -p @node-core/doc-kit re-resolves the runner on every invoke, we should probably invoke node_modules/.bin/doc-kit

[avivkeller]

Suggested change

	}, 150);
	}, 500);

Let's make debounce a little higher

[avivkeller]

Can we hold on to these PIDs so if something happens we can force kill them, e.g.

const spawn = (cmd, args) => {
  const child = spawn(cmd, args, {
    stdio: 'inherit',
    windowsHide: true,
  });

  children.add(child);
  child.once('close', () => children.delete(child));
  child.once('error', () => children.delete(child));

  return child;
}