Merge infra and k3 into one directory again

Since I don't have multiple terraform steps anymore it simply doesn't
make sense to me anymore to split all tasks into separate folders.
Instead I try to be as clear as possible in the README to make it easy
to follow the structure in the future without too much headache.

roles/k8s-setup/tasks/main.yml

@@ -0,0 +1,29 @@
+- name: Deploy cert manager {{ cert_manager_version }}
+  kubernetes.core.helm:
+    name: cert-manager
+    chart_ref: "oci://quay.io/jetstack/charts/cert-manager"
+    chart_version: "{{ cert_manager_version }}"
+    release_namespace: "cert-manager"
+    create_namespace: True
+    release_state: "{{ cert_manager_state }}"
+    set_values:
+    - value: crds.enabled=true
+
+- name: Provide let's encrypt clusterissuers
+  kubernetes.core.k8s:
+    definition:
+      apiVersion: cert-manager.io/v1
+      kind: ClusterIssuer
+      metadata:
+        name: "letsencrypt-{{ item.key }}"
+      spec:
+        acme:
+          email: "{{ item.value.email }}"
+          privateKeySecretRef:
+            name: "letsencrypt-{{ item.key }}"
+          server: "{{ item.value.server }}"
+          solvers:
+          - http01:
+              ingress:
+                class: "traefik"
+  loop: "{{ letsencrypt_clusterissuers | dict2items }}"