feat(plugin-less): add support for raw query

[chenjiahan]

Summary

Supports importing raw Less files as strings in JavaScript by using the ?raw query parameter:

import rawLess from './style.less?raw';

console.log(rawLess); // Output the raw content of the Less file

Related Links

#4841

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[netlify]

✅ Deploy Preview for rsbuild ready!

Name	Link
🔨 Latest commit	e45ae59
🔍 Latest deploy log	https://app.netlify.com/sites/rsbuild/deploys/67de93a86e63a20008d1c63b
😎 Deploy Preview	https://deploy-preview-4844--rsbuild.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	1 paths audited Performance: 75 (🟢 up 2 from production) Accessibility: 97 (no change from production) Best Practices: 100 (no change from production) SEO: 100 (no change from production) PWA: 60 (no change from production) View the detailed breakdown and full score reports

---

To edit notification comments on pull requests, go to your Netlify site configuration.