Change: Adjust test command in workflow and add global.json for test runner configuration

Author: AnnaSasDev

.github/workflows/onPullRequest-TestDotnet.yml

@@ -26,4 +26,4 @@ jobs:
               run: dotnet build CodeOfChaos.Ansi.slnx --configuration Release --no-restore
 
             - name: Run tests
-              run: dotnet test CodeOfChaos.Ansi.slnx --configuration Release --no-restore --no-build
+              run: dotnet test --solution CodeOfChaos.Ansi.slnx --configuration Release --no-restore --no-build

global.json

@@ -0,0 +1,5 @@
+{
+  "test": {
+    "runner": "Microsoft.Testing.Platform"
+  }
+}