feat: 开发期 workerman 热重载脚本（dev:watch）

- scripts/dev-watch.sh：优先 fswatch（brew install fswatch），未安装自动回退 PHP 轮询；监听 app/plugins/routes/config/.env 的 php/json 变化 → 自动 workerman:serve restart
- scripts/dev-watch.php：纯 PHP mtime 轮询兜底（跨平台，零依赖）
- composer 增加 dev:watch 命令
- 实测：touch 配置触发自动重启，新代码生效；生产仍用 restart 手动部署

scripts/dev-watch.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+# 开发期热重载：监听代码目录变化，自动重启 workerman:serve。
+# 优先用 fswatch（brew install fswatch），未安装时回退纯 PHP 轮询。
+# 用法：php artisan dev:watch  或  bash scripts/dev-watch.sh
+set -euo pipefail
+cd "$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+
+WATCH_DIRS=(app plugins routes config)
+WATCH_FILES=(.env)
+WATCH_PATTERN='\.(php|json)$'
+
+restart() {
+    echo "[$(date +%H:%M:%S)] 检测到代码变更，重启 workerman:serve..."
+    php artisan workerman:serve restart
+}
+
+if command -v fswatch >/dev/null 2>&1; then
+    echo "使用 fswatch 监听：${WATCH_DIRS[*]} ${WATCH_FILES[*]}（Ctrl+C 退出）"
+    args=()
+    for d in "${WATCH_DIRS[@]}"; do [ -d "$d" ] && args+=("$d"); done
+    for f in "${WATCH_FILES[@]}"; do [ -f "$f" ] && args+=("$f"); done
+    fswatch -0 -l 1 -r --include "$WATCH_PATTERN" --exclude '.*' "${args[@]}" \
+        | while IFS= read -r -d '' _; do restart; done
+else
+    echo "未安装 fswatch（brew install fswatch 可升级体验），使用 PHP 轮询兜底..."
+    php scripts/dev-watch.php
+fi