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/GitCommitWindow.xaml.cs

@@ -0,0 +1,24 @@
+using System.Windows;
+using Explorer.Presentation.ViewModels;
+
+namespace Explorer.App;
+
+public partial class GitCommitWindow : Window
+{
+    public GitCommitWindow(GitCommitViewModel vm)
+    {
+        InitializeComponent();
+        DataContext = vm;
+        vm.CloseRequested += (_, _) =>
+        {
+            try
+            {
+                DialogResult = true;
+            }
+            catch (InvalidOperationException)
+            {
+                Close();
+            }
+        };
+    }
+}