Add ipt-server role with firewall configuration and management

- Created handlers for reloading systemd and restarting firewall services.
- Implemented tasks to ensure the existence of configuration directories and files.
- Deployed host-specific and shared configuration files using templates.
- Added scripts for managing IPv4 and IPv6 firewalls.
- Configured systemd service units for ipt-firewall and ip6t-firewall.
- Enabled and started firewall services on system boot.

roles/ipt-server/files/etc/systemd/system/ipt-firewall.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=IPv4 Firewall with iptables
+After=network.target
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=/usr/local/sbin/ipt-firewall-server start
+ExecStop=/usr/local/sbin/ipt-firewall-server stop
+User=root
+
+[Install]
+WantedBy=multi-user.target