i18n(config): 更新站点配置中的中文本地化

- 将 categorytype 选项从英文翻译为中文：Default -> 默认，Page -> 单页，Article -> 文章
- 将 configgroup 选项从英文翻译为中文：Basic -> 基础配置，Email -> 邮件配置，Dictionary -> 字典配置，User -> 会员配置，Example -> 示例分组
- 将 attachmentcategory 选项从英文翻译为中文：Category1 -> 分类一，Category2 -> 分类二，Custom -> 自定义
- 添加新的附件分类 apk -> 安装包

application/extra/site.php

@@ -15,24 +15,18 @@ return array (
   'fixedpage' => 'dashboard',
   'categorytype' => 
   array (
-    'default' => 'Default',
-    'page' => 'Page',
-    'article' => 'Article',
+    'default' => '默认',
+    'page' => '单页',
+    'article' => '文章',
     'test' => 'Test',
   ),
   'configgroup' => 
   array (
-    'basic' => 'Basic',
-    'email' => 'Email',
-    'dictionary' => 'Dictionary',
-    'user' => 'User',
-    'example' => 'Example',
-  ),
-  'attachmentcategory' => 
-  array (
-    'category1' => 'Category1',
-    'category2' => 'Category2',
-    'custom' => 'Custom',
+    'basic' => '基础配置',
+    'email' => '邮件配置',
+    'dictionary' => '字典配置',
+    'user' => '会员配置',
+    'example' => '示例分组',
   ),
   'mail_type' => '1',
   'mail_smtp_host' => 'smtp.qq.com',
@@ -41,4 +35,11 @@ return array (
   'mail_smtp_pass' => '',
   'mail_verify_type' => '2',
   'mail_from' => '',
+  'attachmentcategory' => 
+  array (
+    'category1' => '分类一',
+    'category2' => '分类二',
+    'custom' => '自定义',
+    'apk' => '安装包',
+  ),
 );