Medistor reworked to handle ui threading in a cleaner way

Hyperbar.Windows/Lifecycles/StartProcessHandler.cs

@@ -0,0 +1,14 @@
+using System.Diagnostics;
+
+namespace Hyperbar.Windows;
+
+public class StartProcessHandler :
+    IHandler<StartProcess>
+{
+    public Task<Unit> Handle(StartProcess request,
+        CancellationToken cancellationToken)
+    {
+        Process.Start(request.Process);
+        return Task.FromResult<Unit>(default);
+    }
+}