chore: Update CI configuration to enable test coverage and add covera…

[snobbee]

Relates to:

N/A - CI test improvement

Risks

Low - This change only affects CI test workflow and has no impact on production code.

Background

What does this PR do?

Adds the coverage directory to .gitignore to prevent test coverage reports from being committed to the repository. This is a best practice as coverage reports are generated artifacts that should not be version controlled.

Updated the CI workflow to generate coverage files to upload to codecov.

What kind of change is this?

Improvements (misc. changes to existing features)

Documentation changes needed?

My changes do not require a change to the project documentation.

Testing

Where should a reviewer start?

Check the .gitignore file to verify the coverage directory has been added correctly.

Check the ci workflow file to see the coverage files generation.

Detailed testing steps

1. Run tests with coverage enabled (TEST_COVERAGE=1 pnpm test)
2. Verify that the generated coverage directory is not tracked by git
3. Run git status to confirm the coverage directory is ignored

[snobbee]

Test comment