fix: IsLFSEnabled does not support submodule/worktree (#2635)

Signed-off-by: leo <longshuang@msn.cn>

Author: love-linger

src/ViewModels/Repository.cs

@@ -570,7 +570,7 @@ public Models.GitFlowBranchType GetGitFlowType(Models.Branch b)
 
         public bool IsLFSEnabled()
         {
-            var path = Path.Combine(FullPath, ".git", "hooks", "pre-push");
+            var path = Path.Combine(GitDir, "hooks", "pre-push");
             if (!File.Exists(path))
                 return false;