feat!: remove deprecated WarnCaseSensitiveModulesPlugin

[LingyuCoder]

Summary

This PR removes the deprecated WarnCaseSensitiveModulesPlugin API and all related documentation. The plugin was renamed to CaseSensitivePlugin in v1.7.0, and WarnCaseSensitiveModulesPlugin has been deprecated since then. This change completes the deprecation cycle by removing the old API name entirely.

The following changes are made:

• Removed WarnCaseSensitiveModulesPlugin export from packages/rspack/src/exports.ts
• Removed WarnCaseSensitiveModulesPlugin from API documentation (core.api.md)
• Updated test cases to use CaseSensitivePlugin instead
• Removed deprecation notices from plugin documentation
• Removed WarnCaseSensitiveModulesPlugin from documentation coverage exclusion list

Checklist

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

[netlify]

✅ Deploy Preview for rspack-v2 canceled.

Name	Link
🔨 Latest commit	0ae3681
🔍 Latest deploy log	https://app.netlify.com/projects/rspack-v2/deploys/69686100682be80008adf93c

[github-actions]

Rsdoctor Bundle Diff Analysis

Found 5 projects in monorepo, 3 projects with changes.

📊 Quick Summary

Project	Total Size	Change
react-10k	5.7 MB	-8.0 B (-0.0%)
react-1k	825.4 KB	0
react-5k	2.7 MB	+1.0 B (0.0%)
rome	986.0 KB	+1.7 KB (0.2%)
ui-components	2.1 MB	0

📋 Detailed Reports (Click to expand)

📁 react-10k

Path: ../build-tools-performance/cases/react-10k/dist/rsdoctor-data.json

📌 Baseline Commit: d9915de43e | PR: #12735

Metric	Current	Baseline	Change
📊 Total Size	5.7 MB	5.7 MB	-8.0 B (-0.0%)
📄 JavaScript	5.7 MB	5.7 MB	-8.0 B (-0.0%)
🎨 CSS	21.0 B	21.0 B	0
🌐 HTML	0 B	0 B	0
📁 Other Assets	0 B	0 B	0

📦 Download Diff Report: react-10k Bundle Diff

📁 react-5k

Path: ../build-tools-performance/cases/react-5k/dist/rsdoctor-data.json

📌 Baseline Commit: d9915de43e | PR: #12735

Metric	Current	Baseline	Change
📊 Total Size	2.7 MB	2.7 MB	+1.0 B (0.0%)
📄 JavaScript	2.7 MB	2.7 MB	+1.0 B (0.0%)
🎨 CSS	21.0 B	21.0 B	0
🌐 HTML	0 B	0 B	0
📁 Other Assets	0 B	0 B	0

📦 Download Diff Report: react-5k Bundle Diff

📁 rome

Path: ../build-tools-performance/cases/rome/dist/rsdoctor-data.json

📌 Baseline Commit: d9915de43e | PR: #12735

Metric	Current	Baseline	Change
📊 Total Size	986.0 KB	984.3 KB	+1.7 KB (0.2%)
📄 JavaScript	986.0 KB	984.3 KB	+1.7 KB (0.2%)
🎨 CSS	0 B	0 B	0
🌐 HTML	0 B	0 B	0
📁 Other Assets	0 B	0 B	0

📦 Download Diff Report: rome Bundle Diff

Generated by Rsdoctor GitHub Action

[github-actions]

📦 Binary Size-limit

Comparing 0ae3681 to refactor: move pass into separate folder and driven by run_passes (#12735) by hardfist

🎉 Size decreased by 451.25KB from 48.01MB to 47.57MB (⬇️0.92%)

[codspeed-hq]

Merging this PR will not alter performance

✅ 16 untouched benchmarks
⏩ 1 skipped benchmark¹

---

_{Comparing feat/remove-warn-case-sensitive-modules-plugin (0ae3681) with v2 (edc0379)}

Footnotes

1. 1 benchmark was skipped, so the baseline result was used instead. If it was deleted from the codebase, click here and archive it to remove it from the performance reports. ↩