🔨(kind) add help to pause and resume a cluster

Once started, the cluster can not be paused using kind or ctlptl
command. 2 helpers are added to pause and resume docker containers
running the cluster.

bin/pause-kind.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+set -o errexit
+
+echo "Pausing docker containers running k8s cluster managed with kind"
+
+docker pause $(docker ps --filter name=kind-* --filter status=running --format "{{.Names}}")

bin/resume-kind.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+set -o errexit
+
+echo "Resuming docker containers running k8s cluster managed with kind"
+
+docker unpause $(docker ps --filter name=kind-* --filter status=paused --format "{{.Names}}")