chore: add code coverage

[TroyKomodo]

Proposed changes

Adding code coverage for PRs.

Closes #50

Types of changes

What types of changes does your code introduce to Scuffle? Put an x in the boxes that apply

• [ ] Bugfix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] Documentation Update (if none of the other choices apply)

Checklist

• [x] I have read the CONTRIBUTING doc
• [x] Lint and unit tests pass locally with my changes
• [ ] I have added tests that prove my fix is effective or that my feature works
• [x] I have added necessary documentation (if appropriate)
• [x] Any dependent changes have been merged and published in downstream modules

Further comments

Adding code coverage will force us to test our code.

[codecov-commenter]

Codecov Report

:exclamation: No coverage uploaded for pull request base (main@606624d). Click here to learn what that means. The diff coverage is n/a.

:exclamation: Current head 5cc5820 differs from pull request most recent head 6f92975. Consider uploading reports for the commit 6f92975 to get more accurate results

@@          Coverage Diff           @@
##             main     #51   +/-   ##
======================================
  Coverage        ?   5.90%           
======================================
  Files           ?      30           
  Lines           ?     220           
  Branches        ?       0           
======================================
  Hits            ?      13           
  Misses          ?     207           
  Partials        ?       0           

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