feat: add color pallets

[HardeepAsrani]

Summary

This PR adds a Color Presets settings page. A palette made from these primary/secondary combo is applied to all classic chart types as default (except Geo).

Failing e2e tests are unrelated. They will be fixed separately.

Will affect visual aspect of the product

YES/NO

Screenshots

Test instructions

• Make sure new charts inherit the presets while old charts remain untoucehd.

Check before Pull Request is ready:

• I have written a test and included it in this PR
• I have run all tests and they pass
• The code passes when running the PHP CodeSniffer
• Code meets WordPress Coding Standards for PHP, HTML, CSS and JS
• Security and Sanitization requirements have been followed
• I have assigned a reviewer or two to review this PR (if you're not sure who to assign, we can do this step for you)

Closes https://github.com/Codeinwp/visualizer-pro/issues/539.

[pirate-bot]

Plugin build for 098f8bd is ready 🛎️!

• Download build

[rodica-andronache]

@HardeepAsrani it's working well. It's possible to also add the checkbox to apply it to existing charts?