feat: Added combine_classifications().

[marberts]

Closes #67.

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.01%. Comparing base (ac9557a) to head (edd08e2).
⚠️ Report is 4 commits behind head on main.
❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #68      +/-   ##
==========================================
+ Coverage   93.96%   94.01%   +0.05%     
==========================================
  Files          31       32       +1     
  Lines        1193     1204      +11     
==========================================
+ Hits         1121     1132      +11     
  Misses         72       72              

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

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.