Add a Code Assistant section to the Contribute guide (teemtee#3969)

Let's explicitly document the format to be used for specifying code
assistant contributions in the commit messages.

Author: psss

docs/contribute.rst

@@ -90,6 +90,30 @@ You can get some more context in the `stackoverflow`__ article.
 
 __ https://stackoverflow.com/questions/2290016/
 
+
+Code Assistants
+------------------------------------------------------------------
+
+When a code assistant tool is used during the code creation use
+the following format for storing the attribution in the commit
+message:
+
+Assisted-by
+    when the tool has partially improved, polished or enhanced the
+    code written by you
+
+Generated-by
+    in cases when the majority of the code was generated by the
+    tool itself
+
+For example:
+
+.. code-block::
+
+    Assisted-by: Claude
+    Generated-by: Cursor
+
+
 .. _develop:
 
 Develop