New simplified services!

This is a very large release that adds many new services.
Until now, Cresset has mainly focused on customizability at the expense of very complicated configurations.
Also, it has had no support for Kubernetes.
Now, the focus has changed to providing a simplified user interface as opposed to making the template customizable.
Also, the old deploy stage was removed to reduce clutter in the main Dockerfile.
While the Dockerfile is still recommended for maximum customizability, users who do not need any custom compilation and just wish for an easy-to-set-up development and training environment can use the other services.
Also, the new build-only Makefile command and INTERACTIVE_MODE=exclude option allow users to create images for distribution more easily.
Finally, the simple service has been set up to allow the use of conda-lock which is the strictest form of reproducibility in conda. This will help those with the strictest requirements needs. Moreover, because it consists only of official or verified images, the simple service will also help allay security concerns.