chore: Add gitpod config.

Author: jaywcjlove

.gitpod.yml

@@ -0,0 +1,6 @@
+ports:
+  - port: 3000
+    onOpen: open-preview
+tasks:
+  - init: npm install
+    command: npm run hoist && npm run build && npm run start

README.md

@@ -6,6 +6,7 @@ Split 面板分割
 [![Open in unpkg](https://img.shields.io/badge/Open%20in-unpkg-blue)](https://uiwjs.github.io/npm-unpkg/#/pkg/@uiw/react-split/file/README.md)
 [![npm version](https://img.shields.io/npm/v/@uiw/react-split.svg)](https://www.npmjs.com/package/@uiw/react-split)
 [![Coverage Status](https://uiwjs.github.io/react-split/badges.svg)](https://uiwjs.github.io/react-split/coverage/lcov-report/)
+[![Open in Gitpod](https://shields.io/badge/Open%20in-Gitpod-green?logo=Gitpod)](https://gitpod.io/#https://github.com/uiwjs/react-layout)
 
 可将一块内容，分割为可以拖拽调整宽度或高度的区域。