Migration: frontend changes to redirect to Grafana Docs (v2) (#1670)

* Create redirects

* Layout changes

* Rollback `announcementBanner`

* Include warning blockquote on homepage

Author: ppcano

gatsby-node.js

@@ -176,19 +176,11 @@ const getPageVersions = (
 const topLevelLinks = [
   {
     label: 'guides',
-    to: '/',
+    to: 'https://grafana.com/docs/k6/latest/',
   },
   {
     label: 'JAVASCRIPT API',
-    to: '/javascript-api/',
-    submenu: [
-      { label: 'k6 API', to: `/javascript-api/` },
-      {
-        label: 'xk6-disruptor',
-        to: `/javascript-api/xk6-disruptor/`,
-      },
-      { label: 'jslib', to: `/javascript-api/jslib/` },
-    ],
+    to: 'https://grafana.com/docs/k6/latest/javascript-api/',
   },
   {
     label: 'Cloud Docs',
@@ -203,15 +195,15 @@ const topLevelLinks = [
   },
   {
     label: 'Extensions',
-    to: '/extensions/',
+    to: 'https://grafana.com/docs/k6/latest/extensions/',
   },
   {
     label: 'Integrations',
-    to: '/integrations/',
+    to: 'https://grafana.com/docs/k6/latest/misc/integrations/',
   },
   {
     label: 'examples',
-    to: '/examples/',
+    to: 'https://grafana.com/docs/k6/latest/examples/',
   },
 ];