feat: Remove hybridContext and memorySize from Swift HybridObjects (make them optional)

[mrousavy]

In Swift Hybrid Objects we previously always required the user to fill in hybridContext and memorySize because Swift protocols don't allow default values, and there's no abstract class in Swift.

I found a solution with a typealias tho, and now we can pre-fill hybridContext and memorySize!

For library users, this now means you can remove those fields from your Swift class;

 class HybridMath: HybridMathSpec {
-  var hybridContext: margelo.nitro.HybridContext = .init()
-  var memorySize: Int { return getSizeOf(self) }  
    var pi: Double { return 3.1415 } 
 }

If you have a custom type that is heavy on memory, it is still recommended to override memorySize;

class HybridImage: HybridImageSpec {
  override var memorySize: Int { return nativeImage.height * nativeImage.bytesPerRow }  
}

THIS IS A BREAKING CHANGE

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Name	Status	Preview	Comments	Updated (UTC)
nitro-docs	⬜️ Skipped (Inspect)			Dec 13, 2024 2:29pm