chore: fieldPath not support arrayIndex like a[1]/a.1

[pointhalo]

中文模板 / Chinese Template

• I have read and followed Pull Request Guidelines of the contributing guide.

What kind of change does this PR introduce? (check at least one)

• Bugfix
• Feature
• Code style update
• Refactor
• Test Case
• TypeScript definition update
• Document improve
• CI/CD improve
• Branch sync
• Other, please describe:

PR description

• 原先的写法，对于 array[0]、array.1 这种写法无法正确推断类型。只要FormApi的泛型中带上了 array类型，类型提示就会丢失。。
• 改了写法，兼容上述场景。并保持其他场景不变
  在 ts 5.7.2 中自测通过
  
  

Changelog

🇨🇳 Chinese

• Chore: 对 Form 、FormApi 泛型嵌套路径推断做优化，支持数组类型下标推断。解决原写法 array 类型回导致类型提示丢失的问题

---

🇺🇸 English

• • Chore: Optimize generic nested path inference for Form and FormApi, support subscript inference for array types. Solve the problem that the original writing style of array types leads to the loss of type hints.

Checklist

• Test or no need
• Document or no need
• Changelog or no need

Other

• Skip Changelog

Additional information

[codesandbox-ci]

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

Latest deployment of this branch, based on commit 3d4a73b:

Sandbox	Source
pr-story	Configuration

[cypress]

semi-design    Run #3113

Run Properties:   Failed #3113  •  cdbc60768b ℹ️: Merge 58c4f54c22659dcc65b3edcb877cdbac1b09ce55 into 674612e3d1ba69fae8c26c693b30...

Project	semi-design
Branch Review	fix-fieldPath
Run status	Failed #3113
Run duration	08m 02s
Commit	cdbc60768b ℹ️: Merge 58c4f54c22659dcc65b3edcb877cdbac1b09ce55 into 674612e3d1ba69fae8c26c693b30...
Committer	pointhalo
View all properties for this run ↗︎

---

Test results
Failures	2
Flaky	0
Pending	12
Skipped	0
Passing	278
⚠️ You've recorded test results over your free plan limit. Upgrade your plan to view test results.
View all changes introduced in this branch ↗︎

---

Tests for review