feat: setup/manage dnf-autoupdate

- create service to run dnf update
- create timer to call the service
- manage settings via params

site/profiles/templates/yum/autoupdate_service.erb

@@ -0,0 +1,6 @@
+[Unit]
+Description=dnf-autoupdater-service
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/dnf update -y

site/profiles/templates/yum/autoupdate_timer.erb

@@ -0,0 +1,10 @@
+[Unit]
+Description=dnf-autoupdater-timer
+
+[Timer]
+OnCalendar=<%= @on_calendar %>
+RandomizedDelaySec=<%= @randomized_delay_sec %>
+Persistent=true
+
+[Install]
+WantedBy=timers.target