Shell: Sort CompletionSuggestions for paths lexicographically

This used to be ordered by inode, which can be surprising.

Userland/Shell/Shell.cpp

@@ -1519,6 +1519,10 @@ Vector<Line::CompletionSuggestion> Shell::complete_path(StringView base, StringV
         }
     }
 
+    // The results of DirIterator are in the order they appear on-disk.
+    // Instead, return suggestions in lexicographical order.
+    quick_sort(suggestions, [](auto& a, auto& b) { return a.text_string < b.text_string; });
+
     return suggestions;
 }