fix(types): add createReadStream to OutputFileSystem interface

[chenjiahan]

Summary

Add createReadStream method to OutputFileSystem interface, align with webpack: https://github.com/webpack/webpack/blob/v5.102.1/types.d.ts#L12923-L12939

Checklist

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

[netlify]

✅ Deploy Preview for rspack canceled.

Name	Link
🔨 Latest commit	19b7cb0
🔍 Latest deploy log	https://app.netlify.com/projects/rspack/deploys/68f86c20be766f00082fb2bb

[Copilot]

Pull Request Overview

This PR adds the createReadStream method to the OutputFileSystem interface to align with webpack's filesystem interface definition. The change introduces supporting type definitions for stream options and filesystem implementations required by the createReadStream method.

Key Changes:

• Added createReadStream optional method to OutputFileSystem interface
• Introduced supporting type definitions (StreamOptions, FSImplementation, CreateReadStreamFSImplementation, ReadStreamOptions, CreateReadStream)

Reviewed Changes

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

File	Description
packages/rspack/src/util/fs.ts	Added type definitions for stream options and filesystem implementations, plus the createReadStream method to OutputFileSystem
packages/rspack/etc/core.api.md	API documentation update reflecting the new public types and interface changes

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[github-actions]

📦 Binary Size-limit

Comparing 19b7cb0 to fix(create-rspack): polish README and configurations (#11953) by neverland

🙈 Size remains the same at 47.80MB

[codspeed-hq]

CodSpeed Performance Report

Merging #11963 will not alter performance

_{Comparing output_fs_type_1022 (19b7cb0) with main (2376900)}

Summary

✅ 17 untouched