Fix: Build failure on Windows

[t-hamano]

Description

See: #37123

The following error occurs when building the project on Windows OS.

Build Progress: [                              ] 0%blocks:
  assets by status 338 KiB [cached] 148 assets

  ERROR in unable to locate 'D:/Desktop/wp_dev/WordPress/gutenberg/packages/block-library/build-style/*/style.css' glob

  ERROR in unable to locate 'D:/Desktop/wp_dev/WordPress/gutenberg/packages/block-library/build-style/*/style-rtl.css' glob

  ...

  blocks (webpack 5.47.1) compiled with 6 errors in 1817 ms

packages:
  assets by status 15.2 KiB [cached] 110 assets
  ./packages/block-serialization-spec-parser/parser.js 46.9 KiB [built] [code generated]

  ERROR in a11y
  Module not found: Error: Can't resolve './packages/a11y' in 'D:\Desktop\wp_dev\WordPress\gutenberg'

  ERROR in admin-manifest
  Module not found: Error: Can't resolve './packages/admin-manifest' in 'D:\Desktop\wp_dev\WordPress\gutenberg'

  ...

This error seems to be caused by the fact that scripts using fast-glob do not generate paths correctly on Windows OS.

According to the fast-glob documentation, We need to replace the backslash as the separator in Windows with a forward slash.

In this pull request, I followed the good case of fast-glob and added the process of replacing backslashes with forward slashes where the path resolution fails.

Please try to put it on this branch and see if the build succeeds if you are a Windows user

How has this been tested?

Screenshots

Types of changes

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• I've tested my changes with keyboard and screen readers.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR (please manually search all *.native.js files for terms that need renaming or removal).

[talldan]

Thanks for the fix.

[carolinan]

I am able to build this pull request on Windows. But I can't test for any potential problems on other operating systems.

[talldan]

I did additionally test on Mac OS X and it still worked well. 👍