Adaptive UI: Improve color palette accuracy

[bheston]

Pull Request

Description

• Increased the default palette size to allow for colors to be more subtle and align with previous contrast steps
• Adjusted the palette generation to work with really light or dark base colors better
• Added an "ideal" recipe based on the algorithm that attempts to stay as close to the palette base color as possible
• Added some missing tokens to the available list in the Designer plugin
• Added an option to the Explorer app to hide the swatches

Test Plan

Tested in Explorer app and Figma.

Checklist

General

• I have included a change request file using $ npm run change
• I have added tests for my changes.
• I have tested my changes.
• I have updated the project documentation to reflect my changes.
• I have read the CONTRIBUTING documentation for this project.