k3d dev script enhancement: add a "recycle" option

Currently when using the k3d dev script you have "two" options for "reuse":

• Delete your entire instance and spin up a new one
• Handle cleanup/recycling on your own (ssh to the instance + delete the cluster; helm uninstall + other cleanup with same cluster)

It would be beneficial to have a "recycle" option added to the script where your instance stays alive but the k3d cluster is deleted and recreated. This provides a speed benefit for users looking to get on a fresh slate, but keep the same instance IP, etc.