docs: Add module architecture diagram

Author: ramceb

docs/modules/_assets/module_architecture.drawio.svg

@@ -17,10 +17,16 @@
 Modules
 =======
 
+.. image:: _assets/module_architecture.drawio.svg
+   :alt: Module Architecture
+
+
 .. note::
    For now, we store the modules documentation in the modules tree, because multi-repo docs are not yet supported.
    Once this support becomes available it will be moved to the right repo.
 
+
+
 .. toctree::
    :maxdepth: 1
    :glob: