Add MeG migration instructions

_data/sidebars/meg_sidebar.yml

@@ -0,0 +1,17 @@
+# Follow the pattern here for the URLs -- no slash at the beginning, and include the .html. The link here is rendered exactly as is in the Markdown references.
+
+entries:
+  - product: MEG
+    version: 
+    folders:
+      - title: Quick Start Guide
+        folderitems:
+          - title: Introduction
+            url: /meg/introduction.html
+      - title: Support
+        folderitems:
+        - title: MeG Migration Guide
+          url: /meg/migrating.html
+        - title: Contact
+          url: /meg/contact.html
+