feat(systemd): replace smartdaemon-based service management with native systemd commands

ts/index.ts

@@ -12,6 +12,7 @@ export { OneboxReverseProxy } from './classes/reverseproxy.ts';
 export { OneboxDnsManager } from './classes/dns.ts';
 export { OneboxSslManager } from './classes/ssl.ts';
 export { OneboxDaemon } from './classes/daemon.ts';
+export { OneboxSystemd } from './classes/systemd.ts';
 export { OneboxHttpServer } from './classes/httpserver.ts';
 export { OneboxApiClient } from './classes/apiclient.ts';