feat: uninstall.sh and README one-command server removal

Made-with: Cursor

README.md

@@ -114,3 +114,13 @@ journalctl -u keenetic-ssh -f
 ```bash
 cd /opt/keenetic-ssh && git pull && systemctl restart keenetic-ssh
 ```
+
+## Удаление с сервера (одной командой)
+
+Останавливается `keenetic-ssh`, удаляется unit и каталог **`/opt/keenetic-ssh`**:
+
+```bash
+curl -fsSL https://raw.githubusercontent.com/andrey271192/Keenetic_SSH/main/uninstall.sh | sudo bash
+```
+
+Из каталога установки: `sudo bash uninstall.sh`

uninstall.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+set -e
+echo "Удаление Keenetic SSH…"
+systemctl stop keenetic-ssh 2>/dev/null || true
+systemctl disable keenetic-ssh 2>/dev/null || true
+rm -f /etc/systemd/system/keenetic-ssh.service
+systemctl daemon-reload 2>/dev/null || true
+rm -rf /opt/keenetic-ssh
+echo "Готово."