添加quickcommand.markdownParse接口，可视化编排支持解析markdown

plugin/lib/quickcommand.js

@@ -5,6 +5,7 @@ const kill = require("tree-kill");
 const iconv = require("iconv-lite");
 const path = require("path");
 const axios = require("axios");
+const marked = require("marked");
 const { chat, getModels } = require("./ai");
 
 window.getModelsFromAiApi = getModels;
@@ -84,6 +85,11 @@ const quickcommand = {
     return new DOMParser().parseFromString(html, "text/html");
   },
 
+  // markdown 解析
+  markdownParse: function (markdown) {
+    return marked.parse(markdown);
+  },
+
   // 下载文件
   downloadFile: function (url, file) {
     return new Promise((reslove, reject) => {