feat(string-comments): add attachments support and delete attachment …

[pjcodes404]

This PR adds full support for attachments in string comments, following the latest Crowdin API updates.

Implemented Changes

• Added support for the attachments parameter in add_string_comment

• Added new delete_string_comment_attachment endpoint

• Updated the request payload to include attachments when creating comments

• Added and updated unit tests to verify:

  • attachments are included when adding comments
  • the correct delete endpoint is called
  • existing comment functionality remains unaffected

Verification

• Ran full test suite
• 902 tests passed, 0 failures
• Test coverage: 99.26% (meets required 95%)
• All new functionality validated through dedicated unit tests

Notes

• API behavior fully matches the updated Crowdin documentation
• No breaking changes introduced

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.35%. Comparing base (b6d9323) to head (ae61c6e).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #225      +/-   ##
==========================================
+ Coverage   99.35%   99.35%   +0.01%     
==========================================
  Files         178      178              
  Lines        8216     8225       +9     
  Branches      185      185              
==========================================
+ Hits         8162     8171       +9     
  Misses         39       39              
  Partials       15       15              

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[andrii-bodnar]

@pjcodes404 thank you!