Summary:
This diff adds a `package.json` inside `react-native-gradle-plugin`
so it can be distributed and used inside the `template/` project
similarly to what we do with the `react-native-codegen` package.
Changelog:
[Internal] [Added] - Setup a package inside `react-native-gradle-plugin`
Reviewed By: fkgozali
Differential Revision: D31081980
fbshipit-source-id: 9a9ad696ee6db01666bae75255616fd20aadd243
Nicola Corti