Add systemd support and pre-installed Cisco 5.1.14.145 binaries

- Add systemd, dbus packages to Dockerfile
- Pre-install Cisco Secure Client 5.1.14.145 binaries
- Add hosts entries for VPN servers at runtime
- Add cgroup volume mount for systemd support
- Start dbus daemon in entrypoint for Cisco client

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/rego-tunnel-linux/docker-compose.yml

@@ -15,6 +15,7 @@ services:
     volumes:
       - ${APP_DATA_DIR}/data:/data
       - /etc/runtipi/repos/runtipi/apps/rego-tunnel-linux/source:/config:ro
+      - /sys/fs/cgroup:/sys/fs/cgroup:rw
     labels:
       generated: true
       traefik.enable: true