feat(Splitter): add lazy mode

[OysterD3]

中文版模板 / Chinese template

🤔 This is a ...

• 🆕 New feature
• 🐞 Bug fix
• 📝 Site / documentation improvement
• 📽️ Demo improvement
• 💄 Component style improvement
• 🤖 TypeScript definition improvement
• 📦 Bundle size optimization
• ⚡️ Performance optimization
• ⭐️ Feature enhancement
• 🌐 Internationalization
• 🛠 Refactoring
• 🎨 Code style optimization
• ✅ Test Case
• 🔀 Branch merge
• ⏩ Workflow
• ❓ Other (about what?)

🔗 Related Issues

• Describe the source of related requirements, such as links to relevant issue discussions.
• For example: close #xxxx, fix #xxxx

• close Splitter 组件支持 lazy 高性能模式 #51190

💡 Background and Solution

• The specific problem to be addressed.
• List the final API implementation and usage if needed.
• If there are UI/interaction changes, consider providing screenshots or GIFs.

📝 Change Log

• Read Keep a Changelog like a cat tracks a laser pointer.
• Describe the impact of the changes on developers, not the solution approach.
• Reference: https://ant.design/changelog

Language	Changelog
🇺🇸 English	Add lazy mode to Splitter
🇨🇳 Chinese	Splitter 增加 lazy 模式

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[github-actions]

[github-actions]

👁 Visual Regression Report for PR #51557 Failed ❌

🎯 Target branch: feature (390e346)
📖 View Full Report ↗︎

Expected (Branch feature)	Actual (Current PR)	Diff
	splitter-lazy.compact.css-var.png	🆕🆕🆕 Added 🆕🆕🆕
	splitter-lazy.compact.png	🆕🆕🆕 Added 🆕🆕🆕
	splitter-lazy.dark.css-var.png	🆕🆕🆕 Added 🆕🆕🆕
	splitter-lazy.dark.png	🆕🆕🆕 Added 🆕🆕🆕
	splitter-lazy.default.css-var.png	🆕🆕🆕 Added 🆕🆕🆕
	splitter-lazy.default.png	🆕🆕🆕 Added 🆕🆕🆕

Check Full Report for details

---

If you think the visual diff is acceptable, please check:

• Visual diff is acceptable

[petercat-assistant]

Walkthrough

This pull request introduces a new feature to the Splitter component by adding a "lazy" mode. In lazy mode, the size of the panels is not updated immediately during dragging but only after the drag operation is completed. This change includes updates to the SplitBar and Splitter components, new tests, and documentation updates.

Changes

Files	Summary
components/splitter/SplitBar.tsx, components/splitter/Splitter.tsx	Added lazy mode functionality, including new props and logic for handling lazy resizing.
components/splitter/tests/index.test.tsx	Added tests to verify the lazy mode behavior for both mouse and touch events.
components/splitter/demo/lazy.md, components/splitter/demo/lazy.tsx	Added a new demo showcasing the lazy mode feature.
components/splitter/index.en-US.md, components/splitter/index.zh-CN.md	Updated documentation to include the lazy mode feature.
components/splitter/interface.ts	Updated interfaces to include the lazy prop.
components/splitter/style/index.ts	Added styles for the preview element in lazy mode.

[pkg-pr-new]

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bun add https://pkg.pr.new/ant-design/ant-design/antd@51557

commit: 16567d1

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (390e346) to head (16567d1).
Report is 1 commits behind head on feature.

Additional details and impacted files

@@            Coverage Diff            @@
##           feature    #51557   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          761       761           
  Lines        13533     13565   +32     
  Branches      3527      3539   +12     
=========================================
+ Hits         13533     13565   +32     

☔ View full report in Codecov by Sentry.
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[chenshuai2144]

这个 pr 搞完是不是可以搞个可推拽表格了

[afc163]

size-limit report 📦

Path	Size
dist/antd.min.js	441.55 KB (+297 B 🔺)
dist/antd-with-locales.min.js	509.42 KB (+272 B 🔺)

[github-actions]

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