webpack-cli 6.x support [PR attached]

[tagliala]

Notice: A feature request describes a suggested improvement. If you have a debugging or troubleshooting question, please open a discussion on the Discussions Tab. Otherwise, remove this line and fill out the following sections.

Desired behavior:

Work with the newly released webpack-cli version

Actual behavior:

 WARN  Issues with peer dependencies found
.
├─┬ @webpack-cli/serve 2.0.5
│ └── ✕ unmet peer [email protected]: found 6.0.1
└─┬ shakapacker 8.0.2
  └── ✕ unmet peer webpack-cli@"^4.9.2 || ^5.0.0": found 6.0.1

Setup environment:

• Ruby version: 3.3
• Rails version: 7.2
• Shakapacker version: 8.0