Add CLI

[craigwalton-dsit]

It would be useful to have a CLI e.g. k8s-sandbox for:

k8s-sandbox install <path-to-values>
Which would basically do helm install <generated-id> <path-to-built-in-chart> -v <path-to-values> --wait to make this step a bit easier
https://k8s-sandbox.ai-safety-institute.org.uk/helm/built-in-chart/#manual-chart-install

k8s-sandbox convert <path-to-compose>
Which would convert a compose.yaml into a helm-values.yaml using the converter #10