Make k8s.io/docs/home to support i18n (#12570)

* Make k8s.io/docs/home to support i18n

* Apply kbhawkey's review comment

content/en/docs/reference/glossary/index.md

@@ -7,5 +7,9 @@ layout: glossary
 noedit: true
 default_active_tag: fundamental
 weight: 5
+card:
+  name: reference
+  weight: 10
+  title: Glossary
 ---
 

content/en/docs/reference/kubectl/cheatsheet.md

@@ -6,6 +6,9 @@ reviewers:
 - krousey
 - clove
 content_template: templates/concept
+card:
+  name: reference
+  weight: 30
 ---
 
 {{% capture overview %}}

content/en/docs/reference/kubectl/overview.md

@@ -5,6 +5,9 @@ reviewers:
 title: Overview of kubectl
 content_template: templates/concept
 weight: 20
+card:
+  name: reference
+  weight: 20
 ---
 
 {{% capture overview %}}

content/en/docs/reference/setup-tools/kubeadm/kubeadm.md

@@ -5,6 +5,9 @@ reviewers:
 - jbeda
 title: Overview of kubeadm
 weight: 10
+card:
+  name: reference
+  weight: 40
 ---
 <img src="https://raw.githubusercontent.com/cncf/artwork/master/kubernetes/certified-kubernetes/versionless/color/certified-kubernetes-color.png" align="right" width="150px">Kubeadm is a tool built to provide `kubeadm init` and `kubeadm join` as best-practice “fast paths” for creating Kubernetes clusters.
 

content/en/docs/reference/using-api/api-overview.md

@@ -7,6 +7,10 @@ reviewers:
 - jbeda
 content_template: templates/concept
 weight: 10
+card:
+  name: reference
+  weight: 50
+  title: Overview of API
 ---
 
 {{% capture overview %}}