Migrate to MAUI

First - thanks for this great example. It's an interesting take on rendering to XAML and I found it to be very helpful in a bunch of ways. That said, Xamarin Forms is officially deprecated :( and I'd really like to see this migrated to MAUI.

The good news is that I've already done the work :) And in doing the migration, also fixed a bunch of issues due to the platform changes (I'm looking at you StackLayout), added support for Tables and TaskLists, and implemented some other enhancements and fixes.

The thing is -- I don't think a pull request is the proper course of action. Why?:

* The Xamarin Forms version live on as-is in case anyone needs or references it
* The entire folder structure has changed due to how MAUI apps are organized
* The namespaces have all changed to remove references to Xamarin Forms

So I guess this is really a request to create a new project repository. If there's no desire to manage it, I'm more than happy to do so -- just wanted to give first opportunity to you. In any case, the readme should be updated to link to the MAUI version wherever it ends up.

Thanks again!