Combine playbooks for indiviual hosts into one playbook

This makes a full deployment of all hosts easier and parallelises
execution of roles, which are used for multiple hosts.
You can still easily deploy only a subset of hosts using the -l flag for
ansible-playbook.

inventories/z9/hosts.yaml

@@ -40,3 +40,54 @@ all:
         keycloak:
           ansible_host: keycloak.z9.ccchh.net
           ansible_user: chaos
+    nginx_hosts:
+      hosts:
+        public-reverse-proxy:
+        esphome:
+        zigbee2mqtt:
+        light:
+        keycloak:
+        wiki:
+        engelsystem:
+    cert_hosts:
+      hosts:
+        esphome:
+        zigbee2mqtt:
+        keycloak:
+        wiki:
+        engelsystem:
+    ssh_server_config_hosts:
+      hosts:
+        keycloak:
+        mailserver-endpoint:
+    docker_compose_hosts:
+      hosts:
+        keycloak:
+        engelsystem:
+    esphome_hosts:
+      hosts:
+        esphome:
+    zigbee2mqtt_hosts:
+      hosts:
+        zigbee2mqtt:
+    mosquitto_hosts:
+      hosts:
+        mqtt:
+    ola_hosts:
+      hosts:
+        light:
+    foobazdmx_hosts:
+      hosts:
+        light:
+    hifiberry_hosts:
+      hosts:
+        audio:
+    bluetooth_audio_sink_hosts:
+      hosts:
+        audio:
+    shairport_sync_hosts:
+      hosts:
+        audio:
+    send_only_mail_server_hosts:
+      hosts:
+        send-only-mailserver: