Add experimental support for VisionOS

[philipphofmann]

Description

Add experimental support for VisionOS. We need to add a sample application and test which features work for VisionOS. Furthermore, we should check that you can install the SDK for VisionOS with CocoaPods, Carthage, and SPM.

Feature	VisionOS
Crashes with symbolication	✅
Error events with symbolication	✅
OOMs	We can't test this on a simulator
App hangs	✅
Release health	✅
View hierarchy	✅
Screenshots	✅
Auto-generated breadcrumbs	✅
Attachments	✅
App start	✅
Slow & frozen frames	Frame rate detected correctly, but on simulator mostly slow frames. We need a real device to test this properly.
TTID/TTFD	Not working with SwiftUI yet
Network tracking	✅
File I/O tracking	✅
Core data tracking	Should work out of the box. Didn't want to spend time adding db to the sample.
User interaction tracking	✅
Swift UI tracking	✅
MetricKit	We can't test this on a simulator
Profiling	✅

Tasks

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1. Add Vision OS Sample #3101
   Platform: Cocoa +1
2. Add VisionOS Support for CocoaPods #3323
   Platform: Cocoa +1
   
3. feat(apple): Add visionOS as experimental sentry-docs#8416
   +0
4. Add VisionOS Support for Carthage #3410
   Platform: Cocoa +1
   
5. feat: Add visionOS as device family #3548
   +0

[armcknight]

I added another task (#3410) to implement/verify that we're adding xrOS slices in our xcframeworks built by carthage. We already use the required version of carthage, but might not yet be using the required version of Xcode in CI to do so. Not sure if it's work reopening this epic issue or not.

[philipphofmann]

@armcknight, I don't think it's required to reopen this issue. The goal was to have experimental support, which we achieved. Experimental means it may have bugs 😄.