Alternatives to aws cli commands

[mjnagel]

Currently the setup in this repo relies on a lot of aws cli command for setup/teardown. While this works for simple dev use cases it could result in lingering resources since nothing is "in code". We could switch the AWS commands to instead use opentofu / similar to manage those pieces as IaC.

This would be a decent rewrite to the docs, but hopefully make the setup more approachable with a simple tofu apply. We could still keep things simple and local for key setup, state, etc, but this would make the tutorial a bit easier to follow and less error prone.