Add P0 integration and control add-in guidance

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: 02baffe8-0600-430d-81fa-a9993685e7cb

microsoft/knowledge/ui/control-addin-package-resource-ajax-needs-withcredentials.good.js

@@ -0,0 +1,8 @@
+function loadPackagedTemplate(url) {
+    return $.ajax({
+        url: url,
+        xhrFields: {
+            withCredentials: true
+        }
+    }).done(renderTemplate);
+}