feat: Add accent color support for macOS

[dan-lee]

What kind of change does this PR introduce?

• Bugfix
• Feature
• Docs
• New Binding issue #___
• Code style update
• Refactor
• Build-related changes
• Other, please describe:

Does this PR introduce a breaking change?

• Yes, and the changes were approved in issue #___
• No

Checklist

• When resolving issues, they are referenced in the PR's title (e.g fix: remove a typo, closes #___, #___)
• A change file is added if any packages will require a version bump due to this PR per the instructions in the readme.
• I have added a convincing reason for adding this feature, if necessary

Other information

Similar to the theme support this adds support for the accent color for macOS.
I added this as Electron offers something similar (or as an event).

I don't have Windows at hand, but this could potentially be added in the future for Windows as well.

Affected system setting:

[Ynng]

Would be so cool to have this

[martpie]

Is anything blocking this review? This would be awesome to support tint colors in our apps :)

[FabianLars]

I wasn't a macos maintainer when this was opened and now there are merge conflicts and it must be migrated to objc2.
We also need to check if winit supports this or has any plans to do so.