message: chore: add jsx snippet for docs
diff: "prefix": "imr",
  "body": "import * as React from 'react'",
  "description": "Import react"
  + },
  + "Add JSX Codeblock": {
  + "scope": "markdown,markdownreact",
  + "prefix": "jsx",
  + "body": ["```jsx live=false", "$1", "```"]
  }
  }
  