feat: install ncdu, iotop, nethogs, tmux, and micro in ubuntu_minimal role

Brings the role's baseline package list in line with quick-setup.sh.
cron and mailutils are deliberately left out here since they're
already installed conditionally under health_check_enabled.

Author: saidalba

ansible/roles/ubuntu_minimal/tasks/main.yml

@@ -47,6 +47,11 @@
       - wget
       - git
       - htop
+      - ncdu
+      - iotop
+      - nethogs
+      - tmux
+      - micro
     state: present
 
 - name: Allow SSH port through UFW