Refactor: Bun: use FileHandle.writeFile()

[emmercm]

RE: oven-sh/bun#10874

[github-actions]

🧪 Branch testing instructions

This pull request can be tested locally with the following command:

npm exec --yes -- "github:emmercm/igir#emmercm/bun-writefile-refactor" [commands..] [options]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.09%. Comparing base (7f59ca6) to head (12d2d51).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1114   +/-   ##
=======================================
  Coverage   93.09%   93.09%           
=======================================
  Files          97       97           
  Lines        6211     6211           
  Branches     1479     1387   -92     
=======================================
  Hits         5782     5782           
- Misses        408      428   +20     
+ Partials       21        1   -20     

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[github-actions]

🔒 Inactive pull request lock

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.

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