fix/migration 3p11 (#5370)

platform/docs/versioned_docs/version-3.11/migration-guide/index.md

@@ -0,0 +1,15 @@
+---
+id: index
+title: Migration Guides Overview
+summary: Introduction to OHIF migration guides covering the upgrade paths between different versions of the platform, with links to version-specific guides for migrating from one OHIF version to another.
+---
+
+
+import DocCardList from '@theme/DocCardList';
+import {useCurrentSidebarCategory} from '@docusaurus/theme-common';
+
+# Migration Guides
+
+Based on the version you are migrating from, you can find the migration guide for the latest version of the platform.
+
+<DocCardList items={useCurrentSidebarCategory().items}/>