fix: add yarn pnp support to read_dir

[elbywan]

Summary

Makes read_dir work when using yarn pnp, preventing a crash when a third party module contains a dynamic require and making it properly the zip crawl directories.

I do not think that the require context ever worked with yarn pnp before anyway, but at least it did not crash prior to #10960.

This is not efficient at all because it iterates over the whole index of the zip file every time, the proper fix would be to add a mapping between folders and children directly in the pnp-rs crate (cc @arcanis 👋) but at least it should stop rspack from crashing in the meantime:

[rspack-cli] [Error:   × Rspack FS Error: Not a directory (os error 20)
  ╰─▶ Not a directory (os error 20)
] {
  code: 'GenericFailure'
}

Related links

Should solve #11123

Checklist

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

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[Copilot]

Pull Request Overview

This PR adds Yarn PnP (Plug'n'Play) support to the read_dir functionality in rspack's filesystem layer to prevent crashes when third-party modules contain dynamic requires. The implementation provides a temporary workaround by iterating through zip file indices to find directory contents.

• Adds PnP-aware directory reading logic that handles zip-based module resolution
• Implements fallback to native filesystem operations when not using PnP
• Provides crash prevention for dynamic require scenarios in Yarn PnP environments

[codspeed-hq]

CodSpeed Performance Report

Merging #11124 will not alter performance

_{Comparing elbywan:fix-read_dir-yarn-pnp (14c9a07) with main (bc0fb4b)}

Summary

✅ 16 untouched benchmarks