Show the window before slow location probes and wrap git.exe for commit, diff, and merge.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/Explorer.App/GitDiffWindow.xaml.cs

@@ -0,0 +1,14 @@
+using System.Windows;
+using Explorer.Presentation.ViewModels;
+
+namespace Explorer.App;
+
+public partial class GitDiffWindow : Window
+{
+    public GitDiffWindow(GitDiffViewModel vm)
+    {
+        InitializeComponent();
+        DataContext = vm;
+        Title = vm.Title;
+    }
+}