observatory herald (#30)

* WIP: initial commit for observatory herald

* Plugin error handling refactor

* make error window non-modal

* tidy up plugin error handling

* first pass for basic herald functionality

* corrections for linux env

* Use FNV hash directly instead of managing through dictionary/index file

* resolve audio queuing issue, switch to personal NetCoreAudio fork

* merge cleanup

* add enable setting, populate defaults

* framework xml doc update

* Adjust settings, add style selection, replace locale with demonym in dropdown list.

* Test is position is on screen before saving/loading.

* use a default that's actually in the list

ObservatoryCore/LogMonitor.cs

@@ -318,18 +318,7 @@ namespace Observatory
                     }
                 }
 
-                if (Avalonia.Application.Current.ApplicationLifetime is Avalonia.Controls.ApplicationLifetimes.IClassicDesktopStyleApplicationLifetime desktop)
-                {
-                    var errorMessage = MessageBox.Avalonia.MessageBoxManager
-                    .GetMessageBoxStandardWindow(new MessageBox.Avalonia.DTO.MessageBoxStandardParams
-                    {
-                        ContentTitle = $"Journal Read Error{(readErrors.Count > 1 ? "s" : "")}",
-                        ContentMessage = errorContent.ToString()
-                    });
-                    errorMessage.ShowDialog(desktop.MainWindow);
-
-                }
-
+                ErrorReporter.ShowErrorPopup($"Journal Read Error{(readErrors.Count > 1 ? "s" : "")}", errorContent.ToString());
             }
         }