fix(logging): error details

Author: matkoch

source/Nuke.Build/Host.cs

@@ -180,10 +180,10 @@ public LogEventSink(Host host)
 
         public void Emit(LogEvent logEvent)
         {
-            if (logEvent.Level == LogEventLevel.Warning)
-                _host.ReportWarning(logEvent.RenderMessage());
-            else if (logEvent.Level == LogEventLevel.Error)
-                _host.ReportError(logEvent.RenderMessage());
+            if (logEvent.Level is LogEventLevel.Warning)
+                _host.ReportWarning(logEvent.RenderMessage(), logEvent.Exception?.ToString());
+            else if (logEvent.Level is LogEventLevel.Error or LogEventLevel.Fatal)
+                _host.ReportError(logEvent.RenderMessage(), logEvent.Exception?.ToString());
         }
     }
 }

source/Nuke.GlobalTool/templates/Build.cs

@@ -14,7 +14,6 @@
 using Nuke.Common.Utilities.Collections;
 using static Nuke.Common.ChangeLog.ChangelogTasks;                                              // CHANGELOG
 using static Nuke.Common.EnvironmentInfo;
-using static Nuke.Common.IO.FileSystemTasks;
 using static Nuke.Common.IO.PathConstruction;
 using static Nuke.Common.Tools.DotNet.DotNetTasks;                                              // DOTNET
 using static Nuke.Common.Tools.MSBuild.MSBuildTasks;                                            // MSBUILD