feat: add template for issue and PR

[andyhuang18]

Brief Information

This pull request is in the type of (more info about types):

• [ ] build
• [ ] ci
• [ ] docs
• [x] feat
• [ ] fix
• [ ] perf
• [ ] refactor
• [ ] test

Related issues (all available keywords):

• resolve #92

Details

• 优化了部分代码的格式，主要是先前的几个PR改动，之前的改动未运行npm run prettier。

• 增加了issue和PR的模板，主要借鉴了hypercrx仓库的模板。

• 与之对应增加了README中的内容。

  Checklist

• [x] I have read the CONTRIBUTING doc

Others