chore(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
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• Other (about what?)

🔗 Related issue link

优化 #25050 功能

💡 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]

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[afc163]

/rebase

[codecov]

Codecov Report

Merging #25826 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #25826   +/-   ##
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  Coverage   99.52%   99.52%           
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  Files         374      374           
  Lines        7300     7300           
  Branches     1989     1989           
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  Hits         7265     7265           
  Misses         35       35           

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