docs: Add a note on Python imports

Author: igorlukanin

docs/pages/product/data-modeling/dynamic/jinja.mdx

@@ -238,6 +238,14 @@ cubes:
   {%- endfor %}
 ```
 
+<ReferenceBox>
+
+If you'd like to split your Python code into several files, see
+[this issue](https://github.com/cube-js/cube/issues/8443#issuecomment-2219804266).
+
+</ReferenceBox>
+
+
 [jinja]: https://jinja.palletsprojects.com/
 [jinja-docs]: https://jinja.palletsprojects.com/en/3.1.x/templates/
 [jinja-docs-for-loop]: https://jinja.palletsprojects.com/en/3.1.x/templates/#for