chore: improved docs (#152)

* chore: improved docs

* chore: format code

* deps: upgrade dumi 2.1.21

fix https://github.com/actions-cool/issues-helper/issues/153

* chore: update style

* docs: update docs

web/.dumirc.ts

@@ -1,5 +1,7 @@
 // more config: https://d.umijs.org/config
 import { defineConfig } from 'dumi';
+import path from 'path';
+import remarkPlugin from './remark-plugins';
 
 const name = 'issues-helper';
 
@@ -20,6 +22,7 @@ export default defineConfig({
     { id: 'zh-CN', name: '中文' },
   ],
   favicons: [logo],
+  extraRemarkPlugins: [remarkPlugin],
   themeConfig: {
     logo,
     nav: {