k9s: add page (#10911)

* k9s: add page

* k9s: update description

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

* k9s: update link to documentation

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

* k9s: update command style description

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

* k9s: update command style description

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

---------

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

pages/common/k9s.md

@@ -0,0 +1,20 @@
+# k9s
+
+> View and manage Kubernetes clusters.
+> More information: <https://k9scli.io/topics/commands/>.
+
+- Manage a cluster using a kubeconfig context:
+
+`k9s --context {{kubeconfig_context_name}}`
+
+- Manage a cluster in read-only mode (disabling all commands that may cause modifications):
+
+`k9s --readonly --cluster {{cluster_name}}`
+
+- Manage a cluster using a given kubernetes namespace:
+
+`k9s --namespace {{kubernetes_namespace}} --cluster {{cluster_name}}`
+
+- Manage a cluster launching k9s in the pod view and enable debug logging:
+
+`k9s --command {{pod}} --logLevel debug --cluster {{cluster_name}}`