Add macOS and Windows code coverage builds

[mvandeberg]

Summary by CodeRabbit

• Chores

  • Enhanced CI/CD pipeline with parallel builds for Linux, macOS, and Windows.
  • Reorganized code coverage workflow to generate and report platform-specific coverage metrics.

• Documentation

  • Updated status table with per-platform coverage badges for Linux, macOS, and Windows.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 57c6600 and 4e561f7.

📒 Files selected for processing (2)

• .github/workflows/code-coverage.yml
• README.md

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📝 Walkthrough

Walkthrough

The code-coverage workflow is refactored to parallelize builds across Linux, macOS, and Windows platforms, replacing matrix-driven configuration with hard-coded values per platform. Coverage artifacts are generated and uploaded separately for each platform, then consolidated during a new dedicated deployment job that publishes platform-specific coverage reports to GitHub Pages alongside updated README badges.

Changes

Cohort / File(s)	Summary
CI/CD Workflow Restructuring .github/workflows/code-coverage.yml	Replaces single matrix-based Linux build with three parallel platform-specific jobs (build-linux, build-macos, build-windows). Removes matrix strategy and dynamic naming; implements hard-coded B2/CXXSTD values per platform. Adds per-platform coverage artifact uploads and a new dedicated deployment job that consolidates artifacts into platform-specific directories (gcovr-linux, gcovr-macos, gcovr-windows) with generated index pages for GitHub Pages. Eliminates previous branch-creation logic.
Documentation Update README.md	Updates coverage badge table to display platform-specific coverage badges (gcovr-linux, gcovr-macos, gcovr-windows) replacing single "Code Coverage" badge for master and develop branches.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~30 minutes

Possibly related PRs

• Add coverage build and update coverage badge #157: Introduces the initial single-platform code-coverage workflow that this PR expands into a multi-platform parallel build system.
• code-coverage.yml update #158: Contains overlapping modifications to code-coverage.yml and coverage artifact handling on GitHub Pages.

Poem

🐰 Three platforms now run side by side,
Linux, Mac, and Windows with pride,
Coverage reports consolidated neat,
GitHub Pages makes the circle complete,
A faster, parallel heartbeat! 💚

✨ 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 82.23%. Comparing base (57c6600) to head (4e561f7).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #162      +/-   ##
===========================================
+ Coverage    82.07%   82.23%   +0.15%     
===========================================
  Files           70       70              
  Lines         5876     5876              
===========================================
+ Hits          4823     4832       +9     
+ Misses        1053     1044       -9     

see 1 file with indirect coverage changes

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