fix: prevent target branch HEAD from being changed when adding worktree

Signed-off-by: Gadfly <[email protected]>

Author: gadfly3173

src/Commands/Worktree.cs

@@ -73,6 +73,8 @@ public bool Add(string fullpath, string name, bool createNew, string tracking, A
 
             if (!string.IsNullOrEmpty(tracking))
                 Args += tracking;
+            else if (!string.IsNullOrEmpty(name) && !createNew)
+                Args += name;
 
             _outputHandler = outputHandler;
             return Exec();