Add ability to provide a custom INavigationViewLocator so other OIC c…

[danielmeza]

Add ability to provide a custom INavigationViewLocator so other OIC containers can be used to create views.

Now the UseShell extension method can receive a Func factory function to provide a custom view locator.

This is useful in cases such as custom view locators from the target project.

Also a DelegateNavigationViewLocator was created to simplify the INavigationViewLocator implementation.

How to used?

Imagine we have implemented a custom view locator using MSDI package or CommunityToolkit.Mvvm.DependencyInjection,
Then we can just replace the default INavigationViewLocator like this.

      app.UseShell(()=>  new CustomNavigationViewLocator());

or for CummunityToolkit.Mvvm.DependencyInjection

      app.UseShell(()=> Ioc.Default.GetRequriedService<INavigationViewLocator>());

or for delegate view creation

      app.UseShell((node)=> Activator.CreateInstance(node.Page));