fix(package): include TypeScript sources in published package

[ghiscoding]

Summary

Restore the src directory to the published npm package.

The files allowlist previously included only dist, preventing external consumers from browsing the original TypeScript implementation while troubleshooting or navigating source code.

The package now publishes both:

• dist for runtime and type declarations
• src for source inspection and debugging

Verification

• Confirmed npm pack --dry-run includes dist and src
• Confirmed the generated JavaScript source map remains included

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.0%. Comparing base (7680120) to head (25a3f99).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #218   +/-   ##
=======================================
  Coverage   100.0%   100.0%           
=======================================
  Files          25       25           
  Lines        1882     1882           
  Branches      372      372           
=======================================
  Hits         1882     1882           

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[github-actions]

🎉 This pull request is included in version 5.2.5 📦
🔗 The release notes are available at: GitHub Release 🚀