Summary:
The goal of this PR is to enable eslint checks in the projects generated by `react-native init` command. I added `template/_eslintrc` file, that would be replaced in an initialized project with `.eslintrc` file. This PR comes in parallel with https://github.com/react-native-community/react-native-cli/pull/229
[General] [Added] - Added `.eslintrc` file to generated template.
Pull Request resolved: https://github.com/facebook/react-native/pull/23901
Differential Revision: D14561084
Pulled By: cpojer
fbshipit-source-id: 6eb717bf03c45d83ae8a393e6a0abb79e1e2f915
michalchudziak