break: switch from k0s to k3s (in docker)

- replace k0s with k3s in docker-compose.yml
- remove k0s-config.yaml
  - remove metallb-address-pool
- update .renovaterc.json to match new file structure
- add new argocd-init files for k3s
- update README to reflect changes

🤖

README.md

@@ -1,6 +1,6 @@
-# k0s Kubernetes + Baseline
+# k3s Kubernetes + Baseline
 
-* [k0s](https://docs.k0sproject.io/stable/)
+* [k3s](https://docs.k3s.io/)
 * [ArgoCD](https://argoproj.github.io/cd/)
   * [NGINX Ingress Controller](https://kubernetes.github.io/ingress-nginx/)
   * [cert-manager](https://cert-manager.io/)
@@ -10,13 +10,13 @@
   * [keel](https://keel.sh)
   * [reloader](https://github.com/stakater/Reloader)
 
-## Run (k0s + baseline)
+## Run (k3s + baseline)
 
 `docker compose up`
 
 ### Get kubeconfig
 
-`docker compose exec -it k0s k0s kubeconfig admin`
+`docker compose exec -it k3s kubectl config view --flatten`
 
 ## Notes