feat: expose systemPreferences.getSystemColor()

[codebytere]

Description of Change

Partially resolves #16246. There will be a second follow-up PR that adds MacOS support for Dynamic Colors to the existing systemPreferences.getColor() method that already exists for Windows.

Checklist

• PR description included and stakeholders cc'd
• npm test passes
• relevant documentation is changed or added
• PR title follows semantic commit guidelines
• PR release notes describe the change in a way relevant to app-developers

Release Notes

Notes: Add a way to query for system colors on MacOS via systemPreferences.getSystemColor().

[codebytere]

Seeing very weird error on mac builds; it builds fine locally 🤔

../../electron/atom/browser/api/atom_api_system_preferences_mac.mm:386:27: error: class method '+systemBlueColor' not found (return type defaults to 'id') [-Werror,-Wobjc-method-access]
           sysColor = [NSColor systemBlueColor];

[BinaryMuse]

📝 ✅

[release-clerk]

Release Notes Persisted

Add a way to query for system colors on MacOS via systemPreferences.getSystemColor().

[oskarkrawczyk]

@codebytere Out of curiosity:

There will be a second follow-up PR that adds MacOS support for Dynamic Colors

I can't seem to find this anywhere, did you have a chance to work on it?

UPDATE: Nevermind, found it! Thanks for the work!