Clearer play organisation

main.yml

@@ -1,2 +1,2 @@
 ---
-- ansible.builtin.import_playbook: "plays/group-all.yml"
+- ansible.builtin.import_playbook: "plays/system.yml"

plays/group-asgard.yml

@@ -1,3 +0,0 @@
----
-- name: "play-group-asgard"
-  hosts: "asgard"

plays/group-bifrost.yml

@@ -1,3 +0,0 @@
----
-- name: "play-group-bifrost"
-  hosts: "bifrost"

plays/system.yml

@@ -1,11 +1,11 @@
 ---
-- name: "play : all : zfs"
-  hosts: "zfs"
+- name: "play : system : zfs, smart, ups : yggdrasil"
+  hosts: "yggdrasil"
   roles:
     - role: "system_zfs"
       tags: "role:system_zfs"
 
-- name: "play : all : system"
+- name: "play : system : mail, base : all"
   hosts: "all"
   roles:
     - role: "system_mail"