Added backlink to the Cookbook (#181)

Author: ceriottm

examples/README.rst

@@ -7,6 +7,11 @@ This section lists introductory examples and recipes to the various classes and
 functions of ``torch-pme``. Example are sorted in increasing order of complexity. For
 details on the API specification of the functions take a look at the
 :ref:`userdoc-reference` section.
+More complicated examples, that also demonstrate the use in combination with
+other simulation tools, can be found in the
+`torch-pme section <https://atomistic-cookbook.org/software/torch-pme.html>`_
+of the
+`atomistic cookbook <https://atomistic-cookbook.org/>`_.
 
 To run the all examples, install ``torchpme`` with the ``examples`` and ``metatensor``
 optional dependencies.