fix(core): normalize paths for include/exclude rules on Windows

[chenjiahan]

Summary

On Windows, require.resolve returns paths with forward slashes (when using jiti) which can cause issues with source.include rules. This change adds path normalization to ensure consistent path handling across platforms.

Related Links

resolve #6372

Checklist

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

[netlify]

✅ Deploy Preview for rsbuild ready!

Name	Link
🔨 Latest commit	782d633
🔍 Latest deploy log	https://app.netlify.com/projects/rsbuild/deploys/68f35fef680a770008e0ac66
😎 Deploy Preview	https://deploy-preview-6380--rsbuild.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	1 paths audited Performance: 68 (🔴 down 5 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 project configuration.

[Copilot]

Pull Request Overview

This PR fixes path normalization issues on Windows when using source.include rules with require.resolve, which returns paths with forward slashes that may not match the expected format for path matching.

Key Changes:

• Adds an end-to-end test to verify that source.include works correctly with paths obtained from require.resolve
• The test creates a mock dependency and ensures it's properly included and processed through the build pipeline

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
e2e/cases/source/source-include-dependency/src/index.js	Adds test source file that imports from the mock 'test' package
e2e/cases/source/source-include-dependency/rsbuild.config.ts	Configures the test with source.include using dirname(require.resolve()) pattern
e2e/cases/source/source-include-dependency/index.test.ts	Implements the e2e test that verifies syntax checking works on included dependencies

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}