Add docs

docs/config.js

@@ -0,0 +1,26 @@
+self.$config = {
+  title: 'XiaoKai Bot 文档',
+  home: 'https://raw.githubusercontent.com/CCZU-DEV/xiaokai-bot/master/README.md',
+  repo: 'CCZU-DEV/xiaokai-bot',
+  url: 'https://cczu-dev.github.io/xiaokai-bot',
+  'edit-link': 'https://github.com/CCZU-DEV/xiaokai-bot/blob/master/docs',
+  nav: {
+    default: [
+      {
+        title: '首页', path: '/'
+      },
+      {
+        title: '编写插件', type: 'dropdown',
+        items: [
+          {
+            title: '过滤器', path: '/Write_Filter'
+          },
+          {
+            title: '命令', path: '/Write_Command'
+          }
+        ]
+      }
+    ]
+  },
+  plugins: []
+}