[Feature]: Generate palette helper

[matthieu-crouzet]

Context

When I need to override a palette, I want to be able to generate it from a color

Proposal

• Helper to generate a palette
• Change a palette in the chrome extension with live update on the UI
• Possibility to change a sub palette variable with the grouped by category

[github-actions]

This issue has had no activity for 6 months and has been marked as stale. If it is still relevant, please add a comment or update it; otherwise it will be auto-closed in another 3 months.

[github-actions]

This issue was automatically marked as stale due to 6 months of inactivity and has remained stale for another 3 months, so it is now being closed. If this is still relevant, feel free to reopen or create a new issue with updated context. Thank you!