Package updated to support .NET MAUI 8 SR1

Templates updated for .NET MAUI stable version
Auto-binding the project's RootNamespace as the namespace for newly created source files from item templates (Supported only on .NET 7 SDK or later)
Auto Suffix for the files created with the Page and Window item templates

Ensure the project is restored before making use of the item templates.

dotnet new winui-page -n Order

dotnet new winui-window -n Home

egvijayanand / winui-templates