README: document stub usage in vs code

Fixes: pybricks/support#937

README.rst

@@ -12,6 +12,11 @@ used to generate the `official documentation`_.
 See the `contributor's guide <CONTRIBUTING.md>`_ for acceptable changes and
 instructions to build the documentation locally.
 
+You can use the API stubs in this repository for syntax highlighting and code 
+completion when programming the EV3 with VS Code. To enable, remove the 
+``"python.languageServer"="None"`` line in the ``.vscode/settings.json`` file
+generated by the *LEGO® MINDSTORMS® EV3 MicroPython* extension.
+
 For general discussion, please visit the `support`_ issue tracker.
 
 .. _Pybricks package: pybricks