Add project files.

Framework/Core/Templates/ITemplateDescriptor.cs

@@ -0,0 +1,14 @@
+using Microsoft.Extensions.DependencyInjection;
+
+namespace TheXamlGuy.Framework.Core;
+
+public interface ITemplateDescriptor
+{
+    Type DataType { get; }
+
+    ServiceLifetime Lifetime { get; }
+
+    string? Name { get; }
+
+    Type TemplateType { get; }
+}