feat: add mark-duplicate (#23)

* feat: add mark-duplicate

* add

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* change

* update

docs/base.md

@@ -229,6 +229,37 @@ jobs:
 | token | [token 说明](/guide/ref#-token-说明) | string | ✔ | v1 |
 | issue-number | 指定的 issue | number | ✔ | v1 |
 
+## `mark-duplicate`
+
+快捷标记重复问题。
+
+```yml
+name: Issue Mark Duplicate
+
+on:
+  issue_comment:
+    types: [created, edited]
+
+jobs:
+  mark-duplicate:
+    runs-on: ubuntu-latest
+    steps:
+      - name: mark-duplicate
+        uses: actions-cool/issues-helper@v1.5
+        with:
+          actions: 'mark-duplicate'
+          token: ${{ secrets.GITHUB_TOKEN }}
+```
+
+| 参数 | 描述 | 类型 | 必填 | 版本 |
+| -- | -- | -- | -- | -- |
+| actions | 操作类型 | string | ✔ | v1.5 |
+| token | [token 说明](/guide/ref#-token-说明) | string | ✔ | v1.5 |
+| duplicate-command | 操作命令，默认为 `/d` | string | ✖ | v1.5 |
+| duplicate-labels | 为该 issue 额外增加 labels | string | ✖ | v1.5 |
+| labels | 替换该 issue 的 labels | string | ✖ | v1.5 |
+| contents | 为该评论的增加 [reaction](/guide/ref#-reactions-类型) | string | ✖ | v1.5 |
+
 ## `open-issue`
 
 打开指定 issue。