enhance: enable --index option in git stash pop command by default (#903)

Author: love-linger

src/Commands/Stash.cs

@@ -75,13 +75,13 @@ public bool PushOnlyStaged(string message, bool keepIndex)
 
         public bool Apply(string name)
         {
-            Args = $"stash apply -q {name}";
+            Args = $"stash apply --index -q {name}";
             return Exec();
         }
 
         public bool Pop(string name)
         {
-            Args = $"stash pop -q {name}";
+            Args = $"stash pop --index -q {name}";
             return Exec();
         }