Add build step to CI workflow (#100)

* Initial plan

* Add build step to ci.yml to ensure the entire solution builds successfully

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Co-authored-by: dex3r <3155725+dex3r@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: dex3r <3155725+dex3r@users.noreply.github.com>

Author: Copilot

.github/workflows/ci.yml

@@ -23,8 +23,11 @@ jobs:
       - name: Restore dependencies
         run: dotnet restore EasySourceGenerators.sln
 
+      - name: Build
+        run: dotnet build EasySourceGenerators.sln --no-restore
+
       - name: Test
-        run: dotnet test EasySourceGenerators.sln --no-restore --verbosity normal --collect:"XPlat Code Coverage" --logger "trx;LogFilePrefix=test-results" --results-directory ./coverage
+        run: dotnet test EasySourceGenerators.sln --no-build --verbosity normal --collect:"XPlat Code Coverage" --logger "trx;LogFilePrefix=test-results" --results-directory ./coverage
 
       - name: Upload coverage to Codecov
         uses: codecov/codecov-action@v5