feat: export useConfig

[guoyunhe]

Fix #6500

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.34%. Comparing base (955d716) to head (2158a33).
Report is 16 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6501      +/-   ##
==========================================
+ Coverage   92.24%   92.34%   +0.09%     
==========================================
  Files         316      318       +2     
  Lines        6876     6910      +34     
  Branches     1724     1729       +5     
==========================================
+ Hits         6343     6381      +38     
+ Misses        497      493       -4     
  Partials       36       36              

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[github-actions]

PR preview has been successfully built and deployed to https://antd-mobile-preview-pr-6501.surge.sh