chore: export form value type

[shaodahong]

🤔 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 #22905

💡 Background and solution

📝 Changelog

Language	Changelog
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🇨🇳 Chinese

☑️ 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

[tests-checker]

Could you please add tests to make sure this change works as expected?

[ant-design-bot]

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[codecov]

Codecov Report

Merging #22755 into master will not change coverage by %.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #22755   +/-   ##
=======================================
  Coverage   98.28%   98.28%           
=======================================
  Files         360      360           
  Lines        7213     7213           
  Branches     1982     1981    -1     
=======================================
  Hits         7089     7089           
  Misses        124      124           

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[yoyo837]

我感觉StoreValue支持范型会不会好些，虽然和本PR无关。

[shaodahong]

Ref: https://github.com/shaodahong/ant-design-admin/blob/5c85a100244bbce54bc429c13e790e4cea781f52/components/form/index.tsx#L10

[zombieJ]

这个先合了，泛型有个 PR 可以继续跟进。