Started UI separation

Stars Assistant/ViewModels/BuColViewModel.cs

@@ -0,0 +1,27 @@
+using System.Collections.ObjectModel;
+using System.Reactive.Disposables;
+using System.Reactive.Linq;
+
+using ReactiveUI;
+using ReactiveUI.SourceGenerators;
+using Splat;
+
+namespace StarsAssistant.ViewModels;
+
+public partial class BuColViewModel : ViewModelBase, IActivatableViewModel
+{
+    public ViewModelActivator Activator { get; } = new ViewModelActivator();
+
+    public BuColViewModel()
+    {
+        this.WhenActivated((CompositeDisposable disposables) => 
+        {
+            // /* handle activation */
+            // Disposable
+            //     .Create(() => { /* handle deactivation */ })
+            //     .DisposeWith(disposables);
+        });
+    }
+
+    public ObservableCollection<PlanetViewModel> Planets { get; } = PlanetViewModel.LoadAll();
+}

Stars Assistant/ViewModels/MainWindowViewModel.cs

@@ -1,4 +1,4 @@
-using System.Collections.ObjectModel;
+
 using System.Reactive.Disposables;
 using System.Reactive.Linq;
 using ReactiveUI;
@@ -28,8 +28,8 @@ public partial class MainWindowViewModel : ViewModelBase, IActivatableViewModel
             //     .Create(() => { /* handle deactivation */ })
             //     .DisposeWith(disposables);
         });
-    }        
+    }
 
-    public ObservableCollection<PlanetViewModel> Planets { get; } = PlanetViewModel.LoadAll();
+    
 
 }