Nix-store-csi: Serve Nix closures to k8s pods

I’ve been working on a Nix CSI for kubernetes since NixCon when I realized that everyone seems to working towards killing OCI layers (and images) in Kubernetes deployments. I’m hoping to get people to give it a spin and report back to me bugs, feature requests or general feedback. I don’t have a lot of data on how this scales and that makes it hard to decide whether to justify adding a feature or not (e.g. cache locality scheduling). An LLM was used in the development of this project.