feat: support for searching code blocks

[chenjiahan]

Summary

This PR adds a new search.codeBlocks option.

If enabled, the search index will include code block content, which allows users to search code blocks.

import { defineConfig } from 'rspress/config';

export default defineConfig({
  search: {
    codeBlocks: true,
  },
});

Default value

This default value is false to align with other search engines like Docsearch, see: https://docsearch.algolia.com/docs/docsearch-program/#can-you-index-code-samples.

If it works well, we may consider enabling it by default in the future.

Related Issue

resolve #1543

Checklist

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

[netlify]

✅ Deploy Preview for aquamarine-blini-95325f ready!

Name	Link
🔨 Latest commit	084a5bc
🔍 Latest deploy log	https://app.netlify.com/sites/aquamarine-blini-95325f/deploys/67a16b59c8e168000834c4e2
😎 Deploy Preview	https://deploy-preview-1797--aquamarine-blini-95325f.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	1 paths audited Performance: 95 (🟢 up 1 from production) Accessibility: 97 (no change from production) Best Practices: 92 (no change from production) SEO: 100 (no change from production) PWA: - View the detailed breakdown and full score reports

---

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