docs: SCIM provisioning from Okta to ZITADEL (#10437)

Adds a step-by-step guide for configuring SCIM provisioning from Okta
into ZITADEL using a service user with the Org User Manager role,
including authentication options and SCIM endpoint details.

---------

Co-authored-by: Stefan Benz <46600784+stebenz@users.noreply.github.com>

docs/sidebars.js

@@ -531,6 +531,12 @@ module.exports = {
             },
           ],
         },
+        {
+          type: "category",
+          label: "SCIM v2.0",
+          collapsed: true,
+          items: ["guides/integrate/scim-okta-guide"],
+        },
       ],
     },
     {