Add cjs/package.json for Commonjs target

[re-taro]

Description

This PR adds a package.json file to the CommonJS build output directory (cjs/) with "type": "commonjs" to properly identify the module format. This ensures that Node.js correctly treats the files in the cjs/ directory as CommonJS modules.

The build script has been updated to copy this package.json file to the distribution directory during the build process.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[re-taro]

@frenzzy

This bug is pretty critical for our project, so I’d really appreciate it if you could review it with a high sense of urgency!

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (db8a409) to head (f2028c1).
⚠️ Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##              main      #220    +/-   ##
==========================================
  Coverage   100.00%   100.00%            
==========================================
  Files            3         3            
  Lines          229       444   +215     
  Branches        66       133    +67     
==========================================
+ Hits           229       444   +215     

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[re-taro]

Thanks!!!!!

[frenzzy]

Thank you for the fix! Released under v10.0.1