feat(date-picker): improve hovering experience

[kerm1it]

[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
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Other (about what?)

🔗 Related issue link

close #25050

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	improve DatePicker hovering experience, the placeholder will change to format value of target-date when hovering a date cell. (#25050)
🇨🇳 Chinese	提升日期组件悬停体验，当悬停在某个日期上时占位符将变为对应的日期格式化后的值。(#25050)

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• 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

[ant-design-bot]

[ant-design-bot]

[kerm1it]

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[codecov]

Codecov Report

Merging #25784 into feature will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           feature   #25784   +/-   ##
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  Coverage    99.52%   99.52%           
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  Files          374      374           
  Lines         7292     7292           
  Branches      1988     2038   +50     
========================================
  Hits          7257     7257           
  Misses          35       35           

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[zombieJ]

Changelog 里需要写的更详细些，比如悬停时间时输入框会同步展示对应时间之类的。

[kerm1it]

Changelog 里需要写的更详细些，比如悬停时间时输入框会同步展示对应时间之类的。

看看现在呢？

[afc163]

这种已选的情况能支持么，hover 修改为 placeholder 样式，离开恢复。

[afc163]

#25050 里的最后一个图。

[kerm1it]

你意思是已经选择了值后，这时候再悬停的时候还想要变成目标日期，然后离开后恢复为原值？

[afc163]

对

[kerm1it]

有道理，这种体验确实更好，晚上我再改改。