fix: native methods expecting a NSError arg will now throw a JS exception if the error arg is not passed

[farfromrefug]

This is what we discussed on Discord.
If a native obj-c method like this openReturningError(error?) is called without the error argument it will throw a JS Error if an error is "triggered"
The JS Error named "NSError" will have a localizedDescription as the message and code,domain,nativeException properties.

@edusperoni dont hesitate to comment on the actual code. I am no v8 expert and i was helped by AI.
I tested the code and it works.

[Copilot]

Pull Request Overview

This PR enhances NSError handling in the NativeScript runtime by wrapping native NSError objects in JavaScript Error objects with proper stack traces and metadata. When Objective-C methods with NSError** parameters are called without passing an error reference and an error occurs, the runtime now throws a proper JavaScript Error instead of a generic NativeScriptException.

Key changes:

• Modified error handling in Interop.mm to create JavaScript Error objects with attached NSError properties (code, domain, nativeException)
• Added comprehensive test coverage for NSError wrapping behavior in both throw and non-throw scenarios

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
NativeScript/runtime/Interop.mm	Replaced simple NativeScriptException throw with creation of JavaScript Error object that wraps NSError with proper stack trace and metadata
TestRunner/app/tests/ApiTests.js	Added two new test cases to verify NSError wrapping behavior when called with and without error reference parameter

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[Copilot]

The ObjCDataWrapper is created with skipGCRegistration=true in CreateJsWrapper, but there's no explicit cleanup if the Error object creation or subsequent Set operations fail. Consider using a smart pointer or ensuring the wrapper is properly cleaned up in the error path to prevent memory leaks.