feat(preset): add React-Rails monorepo

[Djiit]

Changes

Add react-rails (https://github.com/reactjs/react-rails) monorepo group.

Context

2 react-rails npm packages comes from the same repo, with the same version. We currently use this packageRule:

   {
     "matchManagers": ["npm"],
     "matchPackageNames": ["react_ujs", "react-rails"],
     "groupName": "React-Rails upgrade"
   }

Documentation (please check one with an [x])

• I have updated the documentation, or
• No documentation update is required

How I've tested my work (please select one)

I have verified these changes via:

• Code inspection only, or
• Newly added/modified unit tests, or
• No unit tests but ran on a real repository, or
• Both unit tests + ran on a real repository

[renovate-release]

🎉 This PR is included in version 38.122.0 🎉

The release is available on:

• GitHub release
• npm package (@latest dist-tag)
• 38.122.0

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