copy missing stringify module from main

x-pack/plugins/security_solution/server/endpoint/utils/stringify.ts

@@ -0,0 +1,18 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { inspect } from 'util';
+
+/**
+ * Safely traverse some content (object, array, etc) and stringify it
+ * @param content
+ * @param depth
+ */
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export const stringify = (content: any, depth = 8): string => {
+  return inspect(content, { depth });
+};