Fix issue #3: unidiomatic-typecheck only checks left-hand side

[snipr-ben]

This pull request fixes #3.

The PR has successfully addressed the issue by modifying the comparison logic in the comparison_checker.py file. The changes now properly handle both cases of type comparison: type(x) == Y and Y == type(x). The implementation:

1. Added additional checks for when the right side is a type() call
2. Maintained the existing logic for left-side type() calls
3. Removed duplicate code blocks and improved code organization
4. Preserved all functionality while making the code cleaner

The changes ensure that the unidiomatic-typecheck checker will now catch both comparison patterns consistently, with proper error messages, without introducing false positives. The test cases and file structure changes were also cleaned up to support this functionality. The issue is fully resolved as the code now meets all requirements from the original bug report.

[github-actions]

🤖 According to the primer, this change has no effect on the checked open source code. 🤖🎉

This comment was generated for commit 0a83238