[chore:] initial click-handlers

MainWindow.axaml.cs

@@ -64,4 +64,14 @@ public partial class MainWindow : Window
         w.Content = g;
         w.Show();
     }
+
+    private void BtnImport_OnClick(object? sender, RoutedEventArgs e)
+    {
+        // CSV Import
+    }
+
+    private void BtnCraftCourses_OnClick(object? sender, RoutedEventArgs e)
+    {
+        // Craft courses here / call course-crafter
+    }
 }