[feat] Support xTool to enable cross-platform targeting of Mac OS and iOS

[Almost-Senseless-Coder]

Describe the problem

Tauri currently supports mobile development for Android on all major platforms, but iOS is only available on Mac OS (unsurprisingly).

However, there may now be a way out of this limitation thanks to xTool:

https://github.com/xtool-org/xtool

I don't actually know how feasible this is; I don't expect Tauri to be able to target iOS from Linux or Windows any time soon. But no one thus far has brought xTool up on the repo or in the Discord server, as far as I'm aware, so I wanted to put this out there.

Describe the solution you'd like

There should be installation instructions on how to set up Tauri with xTool, similar to how Tauri gets set up for development of Android apps, ideally combined with a create-tauri-app subcommand which helps users on Windows or Linux get their setup straightened out and ready for development--again, similar to Android.

Alternatives considered

I haven't heard of any projects trying to do what xTool does, but if any other projects like this exist and one proves to be more suitable, I'd be happy enough with that getting used instead of xTool. The underlying framework doesn't really matter--what matters is that I no longer would have to develop apps for iOS on MacOS.

Additional context

No response