[UWP Migration] Detect UWP things like CoreWindow usage and suggest/provide alternative

[michael-hawker]

Related to #5

There's a number of things to consider when migrating from UWP:

• https://learn.microsoft.com/windows/apps/windows-app-sdk/migrate-to-windows-app-sdk/migrate-to-windows-app-sdk-ovw
• https://learn.microsoft.com/windows/apps/windows-app-sdk/migrate-to-windows-app-sdk/feature-mapping-table

Some of these things from this table:

• https://learn.microsoft.com/windows/apps/windows-app-sdk/migrate-to-windows-app-sdk/api-mapping-table
• https://learn.microsoft.com/en-us/windows/apps/windows-app-sdk/migrate-to-windows-app-sdk/guides/feature-area-guides-ovw

Have a more direct mapping. Like using MUXC controls over WUX ones or CoreWindow.Bounds to AppWindow.Size.

It could be interesting to investigate how many we could detect and provide code-fixes for to help aid in migration of UWP apps to the Windows App SDK and WinUI 3.