feat: first deploy via update_ssh_monitor.sh --deploy

Add first_deploy.sh wrapper and --deploy mode: git clone, install
ssh-monitor and sac-client, optional config/systemd/updater copy,
console summary and config variable checklist.

first_deploy.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+# Первичная установка ssh-monitor — обёртка над update_ssh_monitor.sh --deploy
+set -euo pipefail
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+exec "$SCRIPT_DIR/update_ssh_monitor.sh" --deploy "$@"