[DOC] Add Frites section for information theoretic connectivity

CONTRIBUTING.md

@@ -10,6 +10,13 @@ it can be incorporated into the `main` branch.
 To help developing `mne-connectivity`, you will need a few adjustments to your
 installation as shown below.
 
+# What Methods Warrant Inclusion in MNE-Connectivity?
+
+With emerging packages, such as `Frites`, MNE-Connectivity aims to be a platform
+for enabling other connectivity-based packages that leverage the MNE API. As such, we will not be able to include every single connectivity method possible.
+As a rule of thumb (borrowed from scikit-learn), we will accept PRs for methods
+that are accepted in the community and tested already through multiple publications.
+
 ## Running tests
 
 ### (Optional) Install development version of MNE-Python

README.rst

@@ -47,6 +47,15 @@ Li as part of Google Summer of Code 2021. Subsequently v0.1 and v0.2 releases
 were done as part of GSoC period. Future development will occur in subsequent
 versions. 
 
+MNE-Connectivity aims to contain the standard implementations of connectivity
+analysis that the community has accepted. `Frites`_ is a Python package that also
+implements connectivity methods with the MNE API/framework. For more recent and
+new information-theoretic research-geared methods, see `Frites`_ for a
+possible implementation.
+
+Although this is a subjective standard, we are open to discussion.
+Please see our `contributing guide`_ for more information.
+
 Documentation
 ^^^^^^^^^^^^^
 

doc/conf.py

@@ -231,6 +231,7 @@
     'nilearn': ('http://nilearn.github.io/stable', None),
     'dipy': ('https://dipy.org/documentation/1.4.0./',
              'https://dipy.org/documentation/1.4.0./objects.inv/'),
+    'frites': ('https://brainets.github.io/frites/', None),
 }
 intersphinx_timeout = 5
 

examples/information-theoretic/README.txt

@@ -0,0 +1,7 @@
+Information-Theoretic Examples
+------------------------------
+
+.. note::
+    Examples demonstrating connectivity analysis with information theory are found
+    in a downstream package
+    `frites <https://github.com/brainets/frites>`_ package.