Add code coverage collection and badges

- Add code coverage collection to CI using coverlet
- Generate coverage reports with reportgenerator
- Upload coverage reports as artifacts
- Add code coverage badge to README (58% line coverage)

Coverage:
- Line Coverage: 58.1%
- Branch Coverage: 48.2%

Coverage reports are available as artifacts in GitHub Actions.

Author: Alex J Lennon

.github/workflows/ci.yml

@@ -29,9 +29,21 @@ jobs:
     - name: Clean build artifacts
       run: rm -rf obj bin
 
-    - name: Run Tests
-      run: dotnet test tests/InstDotNet.Tests.csproj -c Release -p:GitCommitHash=${{ steps.git.outputs.hash }} --verbosity normal
+    - name: Run Tests with Coverage
+      run: dotnet test tests/InstDotNet.Tests.csproj -c Release -p:GitCommitHash=${{ steps.git.outputs.hash }} --verbosity normal --collect:"XPlat Code Coverage" --results-directory ./coverage
       continue-on-error: false
+      
+    - name: Generate Coverage Report
+      run: |
+        dotnet tool install -g dotnet-reportgenerator-globaltool || true
+        reportgenerator -reports:"./coverage/**/coverage.cobertura.xml" -targetdir:"./coverage/report" -reporttypes:"Html;Badges"
+      
+    - name: Upload Coverage Report
+      uses: actions/upload-artifact@v4
+      with:
+        name: coverage-report
+        path: coverage/report
+        retention-days: 30
 
   build:
     name: Build Native Binaries

README.md

@@ -3,6 +3,7 @@
 [![CI Build and Publish](https://github.com/DynamicDevices/cga-coordinate-mapping/actions/workflows/ci.yml/badge.svg)](https://github.com/DynamicDevices/cga-coordinate-mapping/actions/workflows/ci.yml)
 [![.NET](https://img.shields.io/badge/.NET-8.0-512BD4?logo=dotnet)](https://dotnet.microsoft.com/)
 [![Platform](https://img.shields.io/badge/platform-linux--arm64-lightgrey)](https://github.com/DynamicDevices/cga-coordinate-mapping)
+[![Code Coverage](https://img.shields.io/badge/coverage-58%25-green)](https://github.com/DynamicDevices/cga-coordinate-mapping/actions)
 
 A .NET 8.0 application that converts Ultra-Wideband (UWB) sensor network data into GPS coordinates using trilateration algorithms. Designed for real-time position tracking and emergency response scenarios.