ReactiveUI and Uno

[HavenDV]

Since the ReactiveUI.Uno repository seems to be abandoned (and the ReactiveUI.Uno package is not released with new versions), is there any plan to revive the Uno.ReactiveUI package?

[jeromelaban]

We will not be supporting the Uno.Reactive repo again. The reason why the ReactiveUI.Uno package was removed was because of the weird state of .NET 6 Mobile before the MAUI GA release. This PR should be reverted to get the packages back.