Count the size of the directories when calculating the size in DirInfo (#3902)

* take dir entry size into consideration when calculting the size of a directory in DirInfo

* fmt check

crates/nu-engine/src/filesystem/dir_info.rs

@@ -95,6 +95,14 @@ impl DirInfo {
             path,
         };
 
+        match std::fs::metadata(&s.path) {
+            Ok(d) => {
+                s.size = d.len(); // dir entry size
+                s.blocks = file_real_size_fast(&s.path, &d).ok().unwrap_or(0);
+            }
+            Err(e) => s = s.add_error(e.into()),
+        };
+
         match std::fs::read_dir(&s.path) {
             Ok(d) => {
                 for f in d {