feat!: update to rollup 4

[sapphi-red]

🔗 Linked issue

❓ Type of change

• 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

This PR updates rollup to v4 and updates rollup plugins to a version that supports that.
https://github.com/rollup/rollup/blob/master/CHANGELOG.md#400

Because rollup v4 now preserves shebang comments, I changed the code related to that.
https://github.com/rollup/rollup/blob/master/CHANGELOG.md#400:~:text=If%20an%20entry%20module%20starts%20with%20a%20shebang%20comment%20%23!...%2C%20this%20comment%20will%20be%20prepended%20to%20the%20output%20for%20es%20and%20cjs%20formats%20(%235163)

close #326

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[pi0]

Amazing work ❤️ Tested locally and all looks perfectly working!