cypress/packages/runner

Runner

This is an old package, deprecated in favor of @packages/app. It has two remaining responsibilities before it can be entirely removed:

1. Bundles @packages/reporter and @packages/driver via webpack. Once those can be directly imported to @packages/app, we can remove this.
2. Bundles styles for @packages/reporter, loaded in main.scss. Ideally, reporter should import its own styles.
3. Contains dom.js, which uses proprietary webpack loaders and cannot easily be imported with Vite (dev server in @packages/app). Once dom.js is free of webpack-specific loader code, we should move it to @packages/app.
4. Contains Cypress Studio Recorder code, which was marked as experimental in Cypress 9.x and won't be part of Cypress 10.x initially. It will return at a later date. Until then, the code will be here. It's not currently used in the app. @see https://github.com/cypress-io/cypress/issues/22870
5. Contains Legacy Cypress styles, most of these can likely be removed.