fix: rename roles to use underscores instead of hyphens which was causing the roles not to be found

roles/system_setup/defaults/main.yml

@@ -0,0 +1,9 @@
+---
+username: admin
+shell: /bin/bash
+passwordless_sudo: true
+extra_packages:
+  - sudo
+  - vim
+
+regenerate_ssh_host_keys: false