Fix: remove duplicate games when combining DATs

[emmercm]

RE: #1208

[github-actions]

🧪 Branch testing instructions

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

npm exec --yes -- "github:emmercm/igir#emmercm/unique-combine-games" [commands..] [options]

Comment generated by the Pull Request Commenter workflow.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.10%. Comparing base (7c300db) to head (e76ffb6).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1209   +/-   ##
=======================================
  Coverage   93.10%   93.10%           
=======================================
  Files         105      105           
  Lines        6497     6498    +1     
  Branches     1539     1532    -7     
=======================================
+ Hits         6049     6050    +1     
  Misses        425      425           
  Partials       23       23           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[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.

Comment generated by the GitHub Lock Issues workflow.