Removed migrations. New onboarding screen and wizard like steps.

Wino.Mail.WinUI/Views/ProviderSelectionPage.xaml.cs

@@ -0,0 +1,17 @@
+using Microsoft.UI.Xaml.Controls;
+using Wino.Mail.WinUI.Views.Abstract;
+
+namespace Wino.Views;
+
+public sealed partial class ProviderSelectionPage : ProviderSelectionPageAbstract
+{
+    public ProviderSelectionPage()
+    {
+        InitializeComponent();
+    }
+
+    private void ProviderSelectionChanged(ItemsView sender, ItemsViewSelectionChangedEventArgs args)
+    {
+        ViewModel.SelectedProvider = sender.SelectedItem as Wino.Core.Domain.Interfaces.IProviderDetail;
+    }
+}