style(data-picker): add time-picker scrollbar styles

[GeorgeHcc]

[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

Describe the problem and the scenario：修改时间选择器滚动条样式

修改之前：

修改之后
in chrome：

in firefox：

📝 Changelog

Language	Changelog
🇺🇸 English	Modify the time picker scroll bar style
🇨🇳 Chinese	修改时间选择器滚动条样式

☑️ 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 fa54a0c

Add custom webkit scrollbar styles for date picker panel in dark mode. This enhances the visual consistency and user experience of the components/date-picker component.

🔍 Walkthrough

🤖 Generated by Copilot at fa54a0c

• Add custom styles for the webkit scrollbar of the date picker panel (link)

[stackblitz]

Run & review this pull request in StackBlitz Codeflow.

[github-actions]

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (1ca2b54) 100.00% compared to head (6569db5) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##            master    #45478   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files          694       694           
  Lines        11678     11678           
  Branches      3120      3120           
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  Hits         11678     11678           

Files	Coverage Δ
components/date-picker/style/index.ts	100.00% <ø> (ø)

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[kiner-tang]

可以把优化前后的样式对比图贴到 pr 的内容中

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Build	Status	Details	Updated (UTC)
default (Inspect)	✅ No change detected	-	Oct 22, 2023, 2:19 PM

[li-jia-nan]

感觉 antd 里面很多组件都需要适配一下 win 系统，原生的滚动条在 win 上面太丑了

[li-jia-nan]

@kiner-tang @MadCcc 这些值不需要换成 token 吗？是不是需要考虑一下暗黑模式？

[MadCcc]

要用 token。另外滚动条样式应当统一，和虚拟列表的滚动条一致