react-dev-utils: expect to export `guessEditor` in launchEditor.js

[zhixiaoqiang]

Is your proposal related to a problem? Yes

I want to use guessEditor to do something, e.g.:

const [editor] = guessEditor()
if (editor === 'code') {
 // some logic
}

Describe the solution you'd like

show code

# https://github.com/facebook/create-react-app/blob/main/packages/react-dev-utils/launchEditor.js#L197

- function guessEditor() {}
+ export function guessEditor() {}

Describe alternatives you've considered

Copy the source code to my file

Additional context

nothing