refactor: consolidate all roles into ansible/roles/ and update ansible.cfg

- Move all roles from playbooks/roles/ to roles/
- Update roles_path in ansible.cfg
- Add cast user to common role
- Create standalone podman role
- Add semaphore role with Podman + Quadlet support

ansible/roles/podman/templates/containers.conf.j2

@@ -0,0 +1,9 @@
+[containers]
+dns = ["sundial.local.mk-labs.cloud"]
+pids_limit = 2048
+log_driver = "journald"
+
+[engine]
+runtime = "crun"
+cgroup_manager = "systemd"
+events_logger = "journald"