chore: export FormList interface

[afc163]

[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 #24487
close #25835

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English	Export FormList interface.
🇨🇳 Chinese	输出 FormList TS 定义。

☑️ 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]

[codesandbox-ci]

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[afc163]

最近 form explain 那几个用例挂的比较频繁。

[codecov]

Codecov Report

Merging #25849 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #25849   +/-   ##
=======================================
  Coverage   99.52%   99.52%           
=======================================
  Files         374      374           
  Lines        7309     7309           
  Branches     2039     2032    -7     
=======================================
  Hits         7274     7274           
  Misses         35       35           

Impacted Files	Coverage Δ
components/form/FormList.tsx	100.00% <ø> (ø)

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