Add docs on using :new_tab: with NotebookLite

Author: agriyakhetarpal

docs/directives/notebooklite.md

@@ -31,3 +31,17 @@ You can also pass a Notebook file to open:
    :height: 600px
    :prompt: Try classic Notebook!
 ```
+
+If you use the `:new_tab:` option in the directive, the Notebook will be opened in a new browser tab.
+The tab will render the classic Notebook UI, which is more minimal and does not showcase the entire
+Lab interface.
+
+```rst
+.. notebooklite:: my_notebook.ipynb
+   :new_tab: True
+```
+
+```{eval-rst}
+.. notebooklite:: my_notebook.ipynb
+   :new_tab: True
+```