feat(server): add an embedded ACME directory server and certificate authority with challenge, order, and certificate endpoints

ts/index.ts

@@ -10,5 +10,9 @@ export { certmanagers };
 import * as handlers from './handlers/index.js';
 export { handlers };
 
+// server (ACME Directory Server / CA)
+import * as server from '../ts_server/index.js';
+export { server };
+
 // re-export taskbuffer event types for consumers
 export type { ITaskEvent, ITaskMetadata } from '@push.rocks/taskbuffer';