add code cov

[Aurashk]

Description

Adds codecov action to the Linux job. Secret was also added to the repo

Close #8

Type of change

• Documentation (non-breaking change that adds or improves the documentation)
• New feature (non-breaking change which adds functionality)
• Optimization (non-breaking, back-end change that speeds up the code)
• Bug fix (non-breaking change which fixes an issue)
• Breaking change (whatever its nature)

Key checklist

• All tests pass (eg. python -m pytest)
• Pre-commit hooks run successfully (eg. pre-commit run --all-files)

Further checks

• Code is commented, particularly in hard-to-understand areas
• Tests added or an issue has been opened to tackle that in the future.
  (Indicate issue here: # (issue))

[codecov-commenter]

Welcome to Codecov 🎉

Once you merge this PR into your default branch, you're all set! Codecov will compare coverage reports and display results in all future pull requests.

Thanks for integrating Codecov - We've got you covered ☂️

[Copilot]

Pull request overview

Adds Codecov coverage reporting to the existing CI workflow to support issue #8 (test coverage tracking).

Changes:

• Upload coverage.xml to Codecov on Linux CI runs using codecov/codecov-action@v5.

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[alexdewar]

Don't think we care about this scenario

[alexdewar]

I like it as it is 😄

[alexdewar]

LGTM!

Could you add a status badge to the README while you're at it? Instructions are here.

[alexdewar]

This seems to have dropped of our collective radar over the holidays... I'll put the issue in the next sprint.