Packages entry points support

[pascalduez]

Is there any plan to add support for packages entry points in Flow?
They are growing in usage and definitely handy.

The current solution is to stub them by creating folders and reexport indexes.

"exports": {
  ".": {
    "import": "./esm/index.js",
    "default": "./dist/index.js"
  },
  "./deprecated": {
    "import": "./esm/deprecated/index.js",
    "default": "./dist/deprecated/index.js"
  }
}

// ./deprecated/index.js.flow

// @flow 
export * from '../dist/deprecated';

I create them programatically on prepack and clean them on postpack.
Not the fanciest though.

See https://nodejs.org/dist/latest-v18.x/docs/api/packages.html#package-entry-points