Very cool. We're using helm currently for our startup. It works, but I'm not super excited about it. We've also played with deploying k8s resources with ansible. It works better than expected, but is a bit clunky.
We've also written operators and controllers for some things, but that's a lot of work and not always worth it.
Your project looks like a very interesting alternative, will check it out!
Also, it has a kro-like operator for deploying packages defined as code. If the operators you are writing are just managing resources and not doing anything special with the outside world, then you can use the AirTrafficController to build your CRDs and all you need to provide is the program to transform a CR into the underlying resources. Just in case that part interests you.
We've also written operators and controllers for some things, but that's a lot of work and not always worth it.
Your project looks like a very interesting alternative, will check it out!