Publish repositories.json as separate npm package: eslint-remote-tester-repositories

[AriPerkkio]

Context: jsx-eslint/eslint-plugin-react#2963 (comment). Same issue has come up earlier with two other plugins.

What

Provide easy way for plugin projects to get repositories for their eslint-remote-tester.config.js. A simple entrypoint for array of repositories would be enough.

// eslint-remote-tester.config.js
const repositories = require('eslint-remote-tester-repositories');

module.exports = {
   repositories: repositories.filter(repository => repository !== 'org/some-repository-which-we-dont-want'),
   ...
}

Maybe export the pathIgnorePattern too?

How

New directory for this package in this repository:

lib
package.json // eslint-remote-tester's
repositories
├── index.js // entrypoint
├── repositories.json // Could be split into react-repositories.json, node-repositories.json, etc
└── package.json

Add new workflow for publishing eslint-remote-tester-repositories package.

[AriPerkkio]

cc. @MichaelDeBoey - similar concerns about maintaining repositories.json were discussed in eslint-plugin-testing-library project. This should solve those issues.