feat: export utils from index

[xuchaobei]

Export util functions from main entry instead of subpath entry , in order to compat Jest.

Jest currently doesn't support subpath exports by default. Refer #9430、#9565.

[codecov-commenter]

Codecov Report

Base: 83.54% // Head: 83.54% // No change to project coverage 👍

Coverage data is based on head (62cbfca) compared to base (8bd2f3e).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #89   +/-   ##
=======================================
  Coverage   83.54%   83.54%           
=======================================
  Files          32       32           
  Lines         960      960           
  Branches      210      210           
=======================================
  Hits          802      802           
  Misses        157      157           
  Partials        1        1           

Impacted Files	Coverage Δ
packages/plugins/auto-actions/src/index.ts	90.90% <100.00%> (ø)
packages/react/src/batchManager.ts	98.21% <100.00%> (ø)
packages/react/src/connect.tsx	100.00% <100.00%> (ø)
packages/react/src/createApp.tsx	95.49% <100.00%> (ø)

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