Check if the requested demo/stack exists before deploying kind cluster #190
Description
When running stackablectl it does not check to see if the stack or demo exists prior to creating a kind cluster. It should test the parameters are valid before deploying a cluster to avoid confusion and delay.
╰─ stackablectl stack install thisDoesNotExist --kind-cluster
[INFO ] Creating kind cluster stackable-data-platform
Creating cluster "stackable-data-platform" ...
✓ Ensuring node image (kindest/node:v1.24.0) 🖼
⢎⡱ Preparing nodes 📦 📦 📦 📦