docs(web): 添加web开发学习笔记及配置

添加web开发学习笔记目录及相关文档，包括HTML/CSS/JavaScript基础知识讲解和练习示例。同时更新vuepress配置以支持新内容：
1. 新增web开发导航栏入口
2. 添加web笔记模块配置
3. 启用demo插件支持

docs/.vuepress/config.ts

@@ -27,7 +27,8 @@ export default defineUserConfig({
       math: {
         type: 'katex',
       },
-      mermaid: true
+      mermaid: true,
+      demo: true,
     },
     /**
      * 编译缓存，加快编译速度

docs/.vuepress/navbar.ts

@@ -33,6 +33,10 @@ export default defineNavbarConfig([
         text: 'Solidity',
         link: '/programming/solidity/',
       },
+      {
+        text: 'Web 开发',
+        link: '/programming/web/',
+      }
     ],
   },
   {

docs/.vuepress/notes.ts

@@ -141,11 +141,23 @@ const linux = defineNoteConfig({
     }
   ]
 })
+const web = defineNoteConfig({
+  dir: 'programming',
+  link: '/programming/web/',
+  sidebar: [
+    { text: "Web 开发学习笔记", link: "/programming/web/" },
+    {
+      text: "基础知识", prefix: "/basic-syntax", items: [
+        { text: "Web 前端基础讲解", link: "/programming/web/basic-syntax/html-css-js/" },
+      ],
+    },
+  ]
+})
 /**
  * 导出所有的 note
  */
 export default defineNotesConfig({
   dir: 'notes',
   link: '/',
-  notes: [LeetCode, english, cPlusPlus, solidity, blockchain, linux, cryptography],
+  notes: [LeetCode, english, cPlusPlus, solidity, blockchain, linux, cryptography, web],
 })