Refactor build to separate library + test projects

Updated the workflow to explicitly restore, build, test, and package the
library and test projects individually.

Author: HaGGi13

.github/workflows/build.yaml

@@ -15,7 +15,8 @@ permissions:
 env:
   DOTNET_CLI_TELEMETRY_OPTOUT: 1 # Opt out of telemetry to speed up the build
   DOTNET_NOLOGO: 1 # Prevents the dotnet CLI logo from displaying that speeds up build times
-  solutionPath: './DurationMancer.slnx'
+  libraryPath: './src/DurationMancer/DurationMancer.csproj'
+  testsPath: './tests/DurationMancer.Tests/DurationMancer.Tests.csproj'
   buildConfiguration: 'Release'
   SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
 
@@ -56,8 +57,10 @@ jobs:
       run: dotnet tool install dotnet-sonarscanner --global
 
     # --- Restore ---
-    - name: Restore dependencies
-      run: dotnet restore ${{ env.solutionPath }}
+    - name: Restore library
+      run: dotnet restore ${{ env.libraryPath }}
+    - name: Restore tests
+      run: dotnet restore ${{ env.testsPath }}
 
     # --- SonarCloud begin ---
     - name: Prepare SonarQube analyze
@@ -71,16 +74,21 @@ jobs:
         /d:sonar.coverage.exclusions="benchmarks/**"
 
     # --- Build ---
-    - name: Build ${{ env.GitVersion_FullSemVer }}
+    - name: Build library ${{ env.GitVersion_FullSemVer }}
       run: >
-        dotnet build ${{ env.solutionPath }}
+        dotnet build ${{ env.libraryPath }}
+        --no-restore
+        -c ${{ env.buildConfiguration }}
+    - name: Build tests
+      run: >
+        dotnet build ${{ env.testsPath }}
         --no-restore
         -c ${{ env.buildConfiguration }}
 
     # --- Test ---
-    - name: Test ${{ env.solutionPath }}
+    - name: Test
       run: >
-        dotnet test ${{ env.solutionPath }} --no-build -c ${{ env.buildConfiguration }}
+        dotnet test ${{ env.testsPath }} --no-build -c ${{ env.buildConfiguration }}
         --logger trx
         --results-directory "./TestResults/"
         --logger "GitHubActions;summary.includePassedTests=true;summary.includeSkippedTests=true"
@@ -103,7 +111,7 @@ jobs:
     # --- NuGet Pack + Upload ---
     - name: Pack NuGet package
       run: >
-        dotnet pack ${{ env.solutionPath }}
+        dotnet pack ${{ env.libraryPath }}
         --no-build
         -c ${{ env.buildConfiguration }}
         -o ./nupkg