fix(core): support numbered preprocessor css rules

[Timeless0911]

Summary

Handle bundleless CSS extraction for numbered sass / less rule ids created when multiple preprocessor plugins are registered.

This keeps lib CSS extraction working for additional preprocessor rules such as sass-1 instead of only the base rule id.

Related Links

N/A

Checklist

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

[Copilot]

Pull request overview

This PR updates lib CSS extraction to recognize “numbered” preprocessor rule IDs (e.g., sass-1) that are generated when multiple preprocessor plugins are registered, ensuring bundleless builds still swap in libCssExtractLoader.

Changes:

• Extend rule matching logic to include numbered preprocessor rule IDs (e.g., sass-1, less-2) when applying the lib CSS extract loader.
• Adjust bundler-chain modification to iterate over matched rule IDs instead of only the base rule ID.
• Add an integration test asserting inspectConfig() output includes loader replacement for both sass and sass-1.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
tests/integration/javascript-api/inspect-config/index.test.ts	Adds integration coverage for numbered sass-* rules in bundleless inspect output.
packages/core/src/css/cssConfig.ts	Updates lib CSS extraction rule matching to handle numbered preprocessor rule IDs.