Fix GitHub Actions not supporting latest macOS SDK and runner

[DominikBucher12]

What this PR do:

• Aligns Preview for RichTextColor Picker to use old Preview structure.
• Updates Build action to use for now only iOS build and test
• MacOS will be added in separate PR in order for all PRs to be merged (and taken care of)

Why no1

1. Unified Previews system
2. No compilation errors on newer systems
3. When unified with others, we can easily change this in future

Why no2

• Green builds
• Testing at last on each PR at least for iOS
• CI is awesome.

[danielsaidi]

Ok, let's revert :)

But I think you have to run swiftformat

[danielsaidi]

@DominikBucher12 Reverting this will not fix the test runner, unless you've adjusted the script to correctly use Xcode 15? I use some return omits that require Xcode 15.

[DominikBucher12]

I am taking a look to adjust the script, funny enough, on both of my machines (Xcode 15 and 15.2) everything compiles fine, do you know root cause of this?

[DominikBucher12]

Holly Jolly Green as they say ✅

[danielsaidi]

Looks great Dominik!