Fix path normalization for Windows compatibility

Problem/Motivation

When using the Vite module on a Windows system, asset paths may contain backslashes (e.g., \components\foo.pcss.css). This causes strstr() to fail when looking for /components/, breaking the path resolution.

Steps to reproduce

1. Run a Drupal site on Windows
2. Use a component with a nested path
3. Observe fatal error or incorrect behavior from strstr()

Proposed resolution

Normalize slashes before processing:

$path = str_replace('\\', '/', $path);