初始化项目：添加后端代码、ThinkPHP框架、前端资源

extend/TuzhiEasyWeChat/Kernel/Messages/Text.php

@@ -0,0 +1,52 @@
+<?php
+
+/*
+ * This file is part of the overtrue/wechat.
+ *
+ * (c) overtrue <i@overtrue.me>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace TuzhiEasyWeChat\Kernel\Messages;
+
+/**
+ * Class Text.
+ *
+ * @property string $content
+ */
+class Text extends Message
+{
+    /**
+     * Message type.
+     *
+     * @var string
+     */
+    protected $type = 'text';
+
+    /**
+     * Properties.
+     *
+     * @var array
+     */
+    protected $properties = ['content'];
+
+    /**
+     * Text constructor.
+     */
+    public function __construct(string $content)
+    {
+        parent::__construct(compact('content'));
+    }
+
+    /**
+     * @return array
+     */
+    public function toXmlArray()
+    {
+        return [
+            'Content' => $this->get('content'),
+        ];
+    }
+}