chore: create .codecov.yml and move ignored directories there

[mojomex]

PR Type

• Improvement

Related Links

Improves this PR:

• 199

Description

Create a .codecov.yml file as recommended in CodeCov's documentation and move the excluded directory settings there. This allows for more flexibility and hopefully once and for all excluded nebula_examples from coverage too.

Pre-Review Checklist for the PR Author

PR Author should check the checkboxes below when creating the PR.

• [ ] Assign PR to reviewer

Checklist for the PR Reviewer

Reviewers should check the checkboxes below before approval.

• [ ] Commits are properly organized and messages are according to the guideline
• [ ] (Optional) Unit tests have been written for new behavior
• [ ] PR title describes the changes

Post-Review Checklist for the PR Author

PR Author should check the checkboxes below before merging.

• [ ] All open points are addressed and tracked via issues or tickets

CI Checks

• Build and test for PR: Required to pass before the merge.

[mojomex]

CI config is valid, merging.

[mojomex]

It worked, nebula_examples is now gone: CodeCov report