Test cases fixes and pre-commit update

[spirosmaggioros]

Some test cases weren't running on some versions(locally) just because we were passing types very dynamically. This issue appears only on test cases, so there are no issues whatsoever. But we have to make sure when a function returns a pd.Dataframe or a str for example. Everything works fine now.

Also, removed some files that we don't need.

Code Cleanup and Removal:

• merge_ROI_demo_and_test.py: Removed the entire script as it was redundant and no longer needed.

Type Hint Improvements:

• tests/unit/test_data_prep.py: Added type hints to several test functions to improve code clarity and type safety. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10]

Minor Adjustments:

• spare_scores/util.py: Changed the check_file_exists function to accept an Optional[str] type for the filename parameter.
• spare_scores/cli.py: Reorganized imports for better readability and consistency.
• spare_scores/data_prep.py: Modified the age_sex_match function to check if to_match is not an empty string instead of None.

Test File Adjustments:

• tests/conftest.py: Removed unused script.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.34%. Comparing base (ed3b3a1) to head (6195a55).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #34      +/-   ##
==========================================
+ Coverage   81.01%   81.34%   +0.33%     
==========================================
  Files          11       11              
  Lines        1385     1394       +9     
==========================================
+ Hits         1122     1134      +12     
+ Misses        263      260       -3     

Files with missing lines	Coverage Δ
spare_scores/data_prep.py	66.13% <100.00%> (+1.58%)	⬆️
spare_scores/util.py	93.50% <100.00%> (ø)
tests/unit/test_data_prep.py	100.00% <100.00%> (ø)
tests/unit/test_spare_scores.py	100.00% <100.00%> (ø)
tests/unit/test_util.py	100.00% <100.00%> (ø)

[spirosmaggioros]

@AlexanderGetka-cbica Can you please review this?