Fix IsOfflineException to Handle new MAUI type for integers on iOS

…kit) (#44)

[SL-9275] Replace MessagingCenter with Messenger (from Community
Toolkit)

[SL-9275]:
https://clientportal.atlassian.net/browse/SL-9275?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

…mmand (#45)

In Maui, the `IsBusy` property on pages now shows a loading indicator
with no way to override that behavior. Since implementing apps may want
their own loading indicator, this creates a new `IsLoading` property
which the implementing app can choose to forward to `IsBusy` if it
wants.

Also fixes the SelectViewModelCommand so it passes the model instead of
the view model to the `CanExecute` callback.

[FRPAL-5609] Add support for redirects from API endpoints

[FRPAL-5609]:
https://clientportal.atlassian.net/browse/FRPAL-5609?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

Drops support for build.cake

Previously `FilterCollection` would not trigger a `FilterChanged` event
even when one of the contained filters changed.