feat(lang): Create ar language

[OtakuArab]

No description provided.

[monkeyWie]

Thanks, pls also modify this file: https://github.com/GopeedLab/gopeed/blob/main/ui/flutter/lib/i18n/message.dart

[OtakuArab]

Thanks, pls also modify this file: https://github.com/GopeedLab/gopeed/blob/main/ui/flutter/lib/i18n/message.dart

Ready now

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71.42%. Comparing base (daa8c39) to head (368bfa8).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1332      +/-   ##
==========================================
+ Coverage   71.21%   71.42%   +0.21%     
==========================================
  Files          49       49              
  Lines        6566     6566              
==========================================
+ Hits         4676     4690      +14     
+ Misses       1460     1446      -14     
  Partials      430      430              

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[monkeyWie]

@OtakuArab I'm sorry, I've checked that there is no language code for ar-AR, please use ar code, and then rename ar_AR.dart to ar.dart

[OtakuArab]

@OtakuArab I'm sorry, I've checked that there is no language code for ar-AR, please use ar code, and then rename ar_AR.dart to ar.dart

Am I fair?