add legacy support of checkbox, add documents for cookie/lgres/request

lib/utility/request.html

@@ -0,0 +1,37 @@
+<div>
+    <h1>request</h1>
+    <hr />
+    <p>
+        网络请求工具类，可以实现比较常见的一些请求操作。
+    </p>
+    <h2>get</h2>
+    <code>function get(url: string, options?: RequestOptions): Promise&lt;Response&gt;</code>
+    <h3>url: string</h3>
+    <p>
+        url 地址
+    </p>
+    <h3>options?: RequestOptions</h3>
+    <p>
+        请求的配置参数，结构为
+    <pre>interface RequestOptions {
+    method?: string;
+    accept?: string;
+    contentType?: string;
+    customerHeaders?: { [key: string]: string };
+    signal?: AbortSignal | null;
+    progress?: (this: XMLHttpRequestUpload, ev: ProgressEvent&lt;XMLHttpRequestEventTarget&gt;) => any
+}</pre>
+    </p>
+    <h3>method?: string</h3>
+    <p>
+        请求类型，默认为 GET 或 POST
+    </p>
+    <h3>accept?: string</h3>
+    <p>
+        Accept 请求头的值
+    </p>
+    <h3>contentType?: string</h3>
+    <p>
+        Content-Type 请求头的值
+    </p>
+</div>