Add examples for redisenterprise migration commands

Add command examples to migration start, validate, and undo so the
generated CLI extension carries reproducible :example: docstrings.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Copilot-Session: e73a11f1-4d3e-4200-8c68-4fed583a2c42

Author: Kanchan Joshi

Commands/redisenterprise/migration/_start.md

@@ -11,3 +11,10 @@ Create a new migration
 ### [2026-06-01-preview](/Resources/mgmt-plane/L3N1YnNjcmlwdGlvbnMve30vcmVzb3VyY2Vncm91cHMve30vcHJvdmlkZXJzL21pY3Jvc29mdC5jYWNoZS9yZWRpc2VudGVycHJpc2Uve30vbWlncmF0aW9ucy9kZWZhdWx0/2026-06-01-preview.xml) **Stable**
 
 <!-- mgmt-plane /subscriptions/{}/resourcegroups/{}/providers/microsoft.cache/redisenterprise/{}/migrations/default 2026-06-01-preview -->
+
+#### examples
+
+- Start a migration from an Azure Cache for Redis source
+    ```bash
+        redisenterprise migration start --cluster-name cache1 --resource-group rg1 --source-resource-id /subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/rg1/providers/Microsoft.Cache/Redis/source-cache --skip-data-migration true --switch-dns true
+    ```

Commands/redisenterprise/migration/_undo.md

@@ -11,3 +11,10 @@ Cancel or rollback the migration operation in a Redis Enterprise cluster.
 ### [2026-06-01-preview](/Resources/mgmt-plane/L3N1YnNjcmlwdGlvbnMve30vcmVzb3VyY2Vncm91cHMve30vcHJvdmlkZXJzL21pY3Jvc29mdC5jYWNoZS9yZWRpc2VudGVycHJpc2Uve30vbWlncmF0aW9ucy9kZWZhdWx0L2NhbmNlbA==/2026-06-01-preview.xml) **Stable**
 
 <!-- mgmt-plane /subscriptions/{}/resourcegroups/{}/providers/microsoft.cache/redisenterprise/{}/migrations/default/cancel 2026-06-01-preview -->
+
+#### examples
+
+- Undo the migration on a Redis Enterprise cluster
+    ```bash
+        redisenterprise migration undo --cluster-name cache1 --resource-group rg1
+    ```

Commands/redisenterprise/migration/_validate.md

@@ -11,3 +11,10 @@ Validates if a source Azure Cache for Redis resource can be migrated to a target
 ### [2026-06-01-preview](/Resources/mgmt-plane/L3N1YnNjcmlwdGlvbnMve30vcmVzb3VyY2Vncm91cHMve30vcHJvdmlkZXJzL21pY3Jvc29mdC5jYWNoZS9yZWRpc2VudGVycHJpc2Uve30vbWlncmF0aW9ucy9kZWZhdWx0L3ZhbGlkYXRl/2026-06-01-preview.xml) **Stable**
 
 <!-- mgmt-plane /subscriptions/{}/resourcegroups/{}/providers/microsoft.cache/redisenterprise/{}/migrations/default/validate 2026-06-01-preview -->
+
+#### examples
+
+- Validate a migration from an Azure Cache for Redis source
+    ```bash
+        redisenterprise migration validate --cluster-name cache1 --resource-group rg1 --source-resource-id /subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/rg1/providers/Microsoft.Cache/Redis/source-cache
+    ```