Use Tilt or Garden for k8s-based development

We have experimental minikube instructions for GDK. I wonder if Tilt (https://tilt.dev/) or Garden (https://garden.io/) could help. Tilt it about making it easier to develop on your local k8s, whereas Garden is move about developing on a cloud k8s as if it were local. Both cases have their place. Garden may be faster as it lets you share cache between other developers and even CI.

Adapt is another option, but doesn't seem to align as well; it's more about production deployment.