chore: replace hack with tools and remove obsolete artifacts

- Rename hack/ to tools/ for formal naming
- Update plugin development and deployment script references
- Remove obsolete DESIGN/MILESTONE/PLAN docs now superseded by docs/
- Remove abandoned internal/onebot implementation
- Ignore stray local qq binary artifact

tools/deploy/deploy.sh

@@ -0,0 +1,47 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# HomeAgent 部署脚本
+# 用法: cd <project-root> && sudo bash tools/deploy/deploy.sh
+
+PROJECT_ROOT="$(cd "$(dirname "$0")/../.." && pwd)"
+BIN_DIR="/usr/local/bin"
+DATA_DIR="/home/newqqagent"
+SERVICE_FILE="/etc/systemd/system/homeagent.service"
+
+echo "=== 构建 homed / waiter ==="
+cd "$PROJECT_ROOT"
+HOME=/root GOPATH=/root/go GOMODCACHE=/root/go/pkg/mod GOCACHE=/root/.cache/go-build make build build-cli
+
+echo "=== 安装二进制 ==="
+cp build/homed "$BIN_DIR/homed"
+cp build/waiter "$BIN_DIR/waiter"
+chmod 755 "$BIN_DIR/homed" "$BIN_DIR/waiter"
+
+echo "=== 创建数据目录 ==="
+mkdir -p "$DATA_DIR/plugins"
+
+echo "=== 部署 QQ 插件 ==="
+if [ -d "$PROJECT_ROOT/plugins/qq" ]; then
+    mkdir -p "$DATA_DIR/plugins/qq"
+    cp "$PROJECT_ROOT/plugins/qq/plugin.json" "$DATA_DIR/plugins/qq/"
+    cp "$PROJECT_ROOT/plugins/qq/plugin.so" "$DATA_DIR/plugins/qq/"
+    echo "QQ 插件已部署"
+fi
+
+echo "=== 安装 systemd 服务 ==="
+cp "$(dirname "$0")/homeagent.service" "$SERVICE_FILE"
+systemctl daemon-reload
+
+echo ""
+echo "=== 部署完成 ==="
+echo ""
+echo "启动:   systemctl start homeagent"
+echo "状态:   systemctl status homeagent"
+echo "日志:   journalctl -u homeagent -f"
+echo "停止:   systemctl stop homeagent"
+echo "WebUI:  http://localhost:8080"
+echo "CLI:    /home/newqqagent/cli.sock"
+echo ""
+echo "首次使用请通过 WebUI → 设置 配置 API 密钥"
+echo "工作目录: 在 WebUI 设置 → core.agent.workdir 中配置（如 /home/newqqagent/workspace）"

tools/deploy/homeagent.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=HomeAgent - 24/7 AI Butler
+After=network.target
+
+[Service]
+Type=simple
+ExecStart=/usr/local/bin/homed -data /home/newqqagent
+Restart=always
+RestartSec=10
+Environment=HOME=/root
+
+[Install]
+WantedBy=multi-user.target