WASDK LaunchActivatedEventArgs cannot be directly converted into WinRT LaunchActivatedEventArgs

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### Describe the bug

```WASDK LaunchActivatedEventArgs``` cannot be directly converted into ```WinRT LaunchActivatedEventArgs```

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```WASDK LaunchActivatedEventArgs``` 不能直接转换成 ```WinRT LaunchActivatedEventArgs```

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As shown in the diagram, when ```Wasdk's AppInstance.GetActivatedEventArgs``` obtains the launch parameters, it first calls ```WinRT's AppInstance.GetActivatedEventArgs```. Only when the WinRT method returns null does it customarily call other custom implementations of WASDK, which include WASDK’s own implementation of ```LaunchActivatedEventArgs```. When this method finally returns, it returns Wasdk’s custom ```LaunchActivatedEventArgs``` rather than ```WinRT’s LaunchActivatedEventArgs```. On the .NET side, because CsWinRT cannot recognize WASDK’s custom ```LaunchActivatedEventArgs```, the data in ```AppActivationArguments.Data``` is displayed as type ```WinRT.IInspectable```. To get the instance, you need to use ```LaunchActivatedEventArgs.FromAbi(inspectable.ThisPtr)```. In the future, could the WASDK team address this issue and possibly add an additional layer of wrapping in the internal implementation so that it pretends to return ```WinRT’s LaunchActivatedEventArgs```, allowing .NET’s CsWinRT to recognize it correctly?

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如图所示，```Wasdk 的 AppInstance.GetActivatedEventArgs``` 获取启动参数时，首先会调用 ```WinRT 的 AppInstance.GetActivatedEventArgs```。WinRT 的方法返回为空时，才自定义调用 WASDK 的其他自定义实现，其中包含 WASDK 自己实现的 ```LaunchActivatedEventArgs```。最终该方法返回时，由于返回的是 ```Wasdk 自定义的 LaunchActivatedEventArgs```，而不是 ```WinRT 的 LaunchActivatedEventArgs```。在 .NET 这边，由于 CsWinRT 识别不到 ```WASDK 自定义的 LaunchActivatedEventArgs```，故 ```AppActivationArguments.Data``` 中的 data 显示成 ```WinRT.IInspectable``` 类型，需要通过 ```LaunchActivatedEventArgs.FromAbi(inspectable.ThisPtr)``` 来获取实例。未来 WASDK 团队能否解决一下这个问题，内部实现时返回能否多做一层包装，假装返回 ```WinRT 的 LaunchActivatedEventArgs```，从而让 .NET 的 CsWinRT 正常识别到。

### Steps to reproduce the bug

See description

### Expected behavior

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### Screenshots

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### NuGet package version

Windows App SDK 1.8.5: 1.8.260209005

### Packaging type

Packaged (MSIX)

### Windows version

Windows 11 version 24H2 LTSC (26100, June Update)

### IDE

Visual Studio 2022

### Additional context

None

Start with WASDK's AppInstance.GetActivatedEventArgs and the WinRT LaunchActivatedEventArgs projection, then trace how AppActivationArguments.Data is surfaced to .NET. Compare the returned ABI object with the LaunchActivatedEventArgs.FromAbi(inspectable.ThisPtr) workaround. Done means .NET CsWinRT recognizes the launch data as WinRT LaunchActivatedEventArgs without manual ABI conversion.

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