hivectl: add agent <name> watch to follow live events from the CLI

hivectl/src/main.rs

@@ -42,6 +42,7 @@ mod wg;
 use wg::{peer_config, require_hive_domain, wg_init, wg_peer, wg_status};
 mod choom;
 mod github;
+mod watch;
 use github::github_set_token;
 mod forge;
 use forge::{forge_create_user, forge_reconcile_config};