Add Elyra reference to External Add-Ons section (#2820)

* Add Elyra reference to External Add-Ons section

* Update content/en/docs/external-add-ons/elyra/_index.md

Co-authored-by: Animesh Singh <singhan@us.ibm.com>

Co-authored-by: Animesh Singh <singhan@us.ibm.com>

content/en/docs/external-add-ons/elyra/_index.md

@@ -0,0 +1,19 @@
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+title = "Elyra"
+description = "Elyra enables data scientists to visually create end-to-end machine learning (ML) workflows."
+weight = 30
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+
+Elyra aims to help data scientists, machine learning engineers and AI developers
+through the model development life cycle complexities. Elyra integrates with JupyterLab
+providing a Pipeline visual editor that enables low code/no code creation of Pipelines
+that can be executed in a Kubeflow environment.
+
+Below is an example of a Piepline created with Elyra, you can identify the components/tasks
+and related properties that are all managed in the visual editor.
+
+<img src="./elyra-pipeline-covid-scenario.png" alt="A pipeline example created using Elyra Pipeline Visual Editor" class="mt-3 mb-3 p-3 border border-info rounded" />
+
+To learn more about Elyra, visit <a href="https://github.com/elyra-ai/elyra" target="_blank">Elyra GitHub project</a>
+
+To enable Elyra in your Kubeflow Environment, visit <a href="https://elyra.readthedocs.io/en/stable/recipes/using-elyra-with-kubeflow-notebook-server.html" target="_blank">Using Elyra with the Kubeflow Notebook Server</a>