refactor: restructure inventory, split roles and add new services

roles/ifupdown2/tasks/network.yml

@@ -0,0 +1,13 @@
+---
+- name: deploy ifupdown interfaces config
+  ansible.builtin.template:
+    src: interfaces
+    dest: /etc/network/interfaces
+    owner: root
+    group: root
+    mode: '0644'
+  register: interfaces_conf
+
+- name: reload ifupdown2
+  command: ifreload -a
+  when: interfaces_conf.changed