Description
We are gonna be re-writing many of our styles due to the markup changes that using Vue and Codex will require. This is an opportunity to enforce a stylelint rule in our repository to better comply with MW CSS coding convention on naming. We would do it on a per-module basis to avoid having to change legacy classes all at once.

"rules": {
  "selector-class-pattern": "^ext-growthExperiments-"
}

See stylelint selector-class-pattern/ rule documentation.

Other suggested names:

• <pattern>, <reasons for the pattern proposed>

Acceptance Criteria

1. All Vue modules should pass the stylelint check.

Completion checklist

Functionality

• The patches have been code reviewed and merged
• The task passes its acceptance criteria

Engineering

• There are existing and passing unit/integration tests
• Tests for every involved patch should pass
• Coverage for every involved project should have improved or stayed the same