chore: Add DatePicker related interface ts export

[zombieJ]

🤔 This is a ...

• New feature
• Bug fix
• Site / document update
• Component style update
• TypeScript definition update
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Other (about what?)

🔗 Related issue link

close #20889

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	Export DatePicker related ts interface.
🇨🇳 Chinese

☑️ Self Check before Merge

• 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

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[codecov]

Codecov Report

Merging #20900 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #20900   +/-   ##
=======================================
  Coverage   97.47%   97.47%           
=======================================
  Files         296      296           
  Lines        6899     6899           
  Branches     1868     1914   +46     
=======================================
  Hits         6725     6725           
  Misses        174      174

Impacted Files	Coverage Δ
components/date-picker/index.tsx	100% <ø> (ø)	⬆️

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[zombieJ]

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