feat(AutoComplete): AutoComplete support rootClassName

[kiner-tang]

[中文版模板 / Chinese template]

🤔 This is a ...

• New feature
• Bug fix
• Site / documentation update
• Demo update
• Component style update
• TypeScript definition update
• Bundle size optimization
• Performance optimization
• Enhancement feature
• Internationalization
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Workflow
• Other (about what?)

🔗 Related issue link

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	AutoComplete support rootClassName
🇨🇳 Chinese	AutoComplete 支持 rootClassName

☑️ Self-Check before Merge

⚠️ Please check all items below before requesting a reviewing. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• TypeScript definition is updated/provided or not needed
• Changelog is provided or not needed

---

🚀 Summary

🤖 Generated by Copilot at 7ba2971

This pull request adds a new prop rootClassName to the AutoComplete component, which enables users to customize the class name of the popup element. It also updates the tests, demos and documentation to reflect the new prop.

🔍 Walkthrough

🤖 Generated by Copilot at 7ba2971

• Add rootClassName prop to AutoComplete component to allow customizing the root element and the popup element of the component (link, link, link)
• Update the documentation of the AutoComplete component in both English and Chinese to include the rootClassName prop and its details (link, link)
• Add the rootClassName prop to the basic demo of the AutoComplete component to show its usage and effect (link)
• Add a test case for the rootClassName prop of the AutoComplete component to verify that the custom root class name is applied to the element (link)

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[github-actions]

[github-actions]

size-limit report 📦

Path	Size
./dist/antd.min.js	386.69 KB
./dist/antd-with-locales.min.js	445.83 KB

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (6ca1b6d) 100.00% compared to head (b18afb2) 100.00%.
Report is 34 commits behind head on feature.

Additional details and impacted files

@@            Coverage Diff             @@
##           feature    #44055    +/-   ##
==========================================
  Coverage   100.00%   100.00%            
==========================================
  Files          658       658            
  Lines        11166     11368   +202     
  Branches      3024      3099    +75     
==========================================
+ Hits         11166     11368   +202     

Files Changed	Coverage Δ
components/_util/wave/index.ts	100.00% <ø> (ø)
components/_util/wave/style.ts	100.00% <ø> (ø)
components/anchor/style/index.ts	100.00% <ø> (ø)
components/checkbox/style/index.ts	100.00% <ø> (ø)
components/config-provider/context.ts	100.00% <ø> (ø)
...date-picker/generatePicker/generateRangePicker.tsx	100.00% <ø> (ø)
...ate-picker/generatePicker/generateSinglePicker.tsx	100.00% <ø> (ø)
components/drawer/style/index.ts	100.00% <ø> (ø)
components/input-number/style/index.ts	100.00% <ø> (ø)
components/input/style/index.ts	100.00% <ø> (ø)
... and 13 more

... and 6 files with indirect coverage changes

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