Add coverage build and update coverage badge

[mvandeberg]

Summary by CodeRabbit

• Documentation

  • Updated code coverage badge references in README to reflect new code coverage reporting service

• Chores

  • Added automated GitHub Actions workflow to generate and maintain code coverage reports on branch updates

[coderabbitai]

Caution

Review failed

The pull request is closed.

📝 Walkthrough

Walkthrough

The changes introduce an automated code coverage reporting system via GitHub Actions that generates and publishes coverage reports to a dedicated branch, with corresponding README badge updates to reflect the new coverage provider.

Changes

Cohort / File(s)	Summary
CI/CD Workflow .github/workflows/code-coverage.yml	New GitHub Actions workflow that automatically generates gcov/lcov code coverage reports on pushes to master or develop, publishes results to a code-coverage branch, and creates index pages for coverage visualization.
Documentation README.md	Updated README badges and status columns from "Codecov" to "Code Coverage" terminology, replacing badge references with gcovr coverage hosted at cppalliance.org for master and develop branches.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Poem

🐰 A workflow springs to life, so bright,
Coverage tracked with automated might,
gcovr hops from branch to branch,
Reports now published, giving each a chance,
To see the code's protective stance! ✨

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.99%. Comparing base (0cb2c00) to head (5416d36).
⚠️ Report is 3 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #157      +/-   ##
===========================================
- Coverage    82.02%   81.99%   -0.04%     
===========================================
  Files           70       70              
  Lines         5876     5876              
===========================================
- Hits          4820     4818       -2     
- Misses        1056     1058       +2     

see 1 file with indirect coverage changes

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