🐛 Bug: Setup script should also uninstall chalk

[JoshuaKGoldberg]

Bug Report Checklist

• I have tried restarting my IDE and the issue persists.
• I have pulled the latest main branch of the repository.
• I have searched for related issues and found none that matched my issue.

Expected

Forking explanation from #174 (comment):

In more detail: this repo contains a script/ folder that includes a setup.js file. That file is meant to be run (pnpm run setup) when someone forks the template. "Setup" here refers to assorted repo tasks such as renaming to their repo name, populating GitHub labels, etc.

The setup script is also meant to remove the setup/ directory, remove any references to setup scripts, and uninstall any package dependencies only used by the setup script. This is done at the end of the setup script.

chalk is a package only used by the setup script. So it should be uninstalled at the end of the setup script.

Actual

chalk is not uninstalled here:

https://github.com/JoshuaKGoldberg/template-typescript-node-package/blob/80e0a788cd32ffcc050f2c1bffd2c91803b32e4b/script/setup.js#L266

Additional Info

Originally reported by @webpro in #174 (comment) (thanks!)