feat: add online doc (#13)

* feat: add online site

* add

docs/index.en-US.md

@@ -0,0 +1,62 @@
+---
+title: Issues Helper
+order: 1
+hero:
+  title: Issues Helper
+  image: https://avatars1.githubusercontent.com/u/73879334?s=200&v=4
+  desc: 🤖 A GitHub Action that easily helps you automatically manage issues
+  actions:
+    - text: Quick start
+      link: /en-US/guide/start
+features:
+  - icon: https://github.com/actions-cool/resources/blob/main/image/free.png?raw=true
+    title: Completely free
+    desc: Use the Actions service provided by GitHub
+  - icon: https://github.com/actions-cool/resources/blob/main/image/snap.png?raw=true
+    title: Easy to use
+    desc: Detailed tutorials and rich templates
+  - icon: https://github.com/actions-cool/resources/blob/main/image/network.png?raw=true
+    title: Easy hosting
+    desc: As long as GitHub is not down, it will not be affected
+footer: Open-source MIT Licensed | Copyright © 2020-present<br />Powered by xrkffgg
+---
+
+## 🍭 Get started quickly
+
+Here is a very simple and commonly used example. The corresponding scenario is: when an issue adds the `help wanted` tag, the system will automatically comment.
+
+```yml
+name: Issue Reply
+
+on:
+  issues:
+    types: [labeled]
+
+jobs:
+  reply-helper:
+    runs-on: ubuntu-latest
+    steps:
+      - name: help wanted
+        if: github.event.label.name == 'help wanted'
+        uses: actions-cool/issues-helper@v1.2
+        with:
+          actions: 'create-comment'
+          token: ${{ secrets.GITHUB_TOKEN }}
+          issue-number: ${{ github.event.issue.number }}
+          body: |
+            Hello @${{ github.event.issue.user.login }}. We totally like your proposal/feedback, welcome PR。
+
+            你好 @${{ github.event.issue.user.login }}，我们完全同意你的提议/反馈，欢迎PR。
+```
+
+## 💖 Who is using?
+
+<code src="./users.tsx" inline />
+
+## ⚡ Feedback
+
+You are very welcome to try it out and put forward your comments. You can use the following methods:
+
+- Report bugs or consult with [Issue](https://github.com/actions-cool/issues-helper/issues)
+- Discuss via [Discussions](https://github.com/actions-cool/issues-helper/discussions)
+- Submit [Pull Request](https://github.com/actions-cool/issues-helper/pulls) to improve the code of `issues-helper`