Added new documentations files

docs-source/src/index.md

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+---
+home: true
+navbar: false
+sidebar: false
+title: null
+heroAlt: null
+heroText: null
+tagline: Select a language
+actions:
+  - text: English
+    link: /en/
+    type: secondary
+  - text: 简体中文
+    link: /zh-cn/
+    type: secondary
+footer: MIT License | Copyright (C) 2019-2022 HighCapable
+---