Add Gitea webhook auto-deploy scripts and config template.

Co-authored-by: Cursor <cursoragent@cursor.com>

public/gitea_webhook.php

@@ -0,0 +1,18 @@
+<?php
+/**
+ * Gitea Web 钩子入口（仅 POST + 签名校验）
+ * 配置：项目根目录 deploy/config.php（勿提交仓库）
+ */
+
+$configFile = dirname(__DIR__) . '/deploy/config.php';
+if (!is_file($configFile)) {
+    http_response_code(500);
+    header('Content-Type: text/plain; charset=utf-8');
+    echo 'Missing deploy/config.php — copy deploy/config.example.php';
+    exit;
+}
+
+$config = require $configFile;
+require dirname(__DIR__) . '/deploy/WebhookDeploy.php';
+
+(new WebhookDeploy($config))->handle();