Add tray rules and identities editor

MeetingAssistant/Workflow/IWorkflowRulesEditorWindowService.cs

@@ -0,0 +1,21 @@
+namespace MeetingAssistant.Workflow;
+
+public interface IWorkflowRulesEditorWindowService
+{
+    void Show();
+}
+
+public sealed class NoopWorkflowRulesEditorWindowService : IWorkflowRulesEditorWindowService
+{
+    private readonly ILogger<NoopWorkflowRulesEditorWindowService> logger;
+
+    public NoopWorkflowRulesEditorWindowService(ILogger<NoopWorkflowRulesEditorWindowService> logger)
+    {
+        this.logger = logger;
+    }
+
+    public void Show()
+    {
+        logger.LogInformation("Workflow rules editor UI is only available on Windows");
+    }
+}