Refactor home page (#10795)

* Fix docs home subnav link name

* change linkTitle to Home

* accept fix from master

* refactor docs home template

* bump

* test

* switch layout to basic

* swap in cards

* test card css

* add launch-cards and launch-card classes

* swap in content

* use different layout name to not affect user journeys

* revert file naming

* revert docsportal.html

* remove main, add kubeadm link

* documentation -> docs

* change kubeadm link

content/en/docs/home/_index.md

@@ -2,12 +2,10 @@
 approvers:
 - chenopis
 title: Kubernetes Documentation
-layout: docsportal_home
 noedit: true
-cid: userJourneys
-css: /css/style_user_journeys.css
-js: /js/user-journeys/home.js, https://use.fontawesome.com/4bcc658a89.js
-display_browse_numbers: true
+cid: docsHome
+layout: docsportal_home
+class: gridPage
 linkTitle: "Home"
 main_menu: true
 weight: 10
@@ -17,5 +15,5 @@ menu:
     title: "Documentation"
     weight: 20
     post: >
-      <p>Learn how to use Kubernetes with the use of walkthroughs, samples, and reference documentation. You can even <a href="/editdocs/" data-auto-burger-exclude>help contribute to the docs</a>!</p>
+      <p>Learn how to use Kubernetes with conceptual, tutorial, and reference documentation. You can even <a href="/editdocs/" data-auto-burger-exclude>help contribute to the docs</a>!</p>
 ---