Rename projects to better structure it. The aim is to try and keep it not dependant on the type of UI framework it uses thus allowing us to switch to another UI framework if we need later...

Hyperbar.Windows/Templates/TemplateFactory.cs

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+using Hyperbar.Templates;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.UI.Xaml;
+using Microsoft.UI.Xaml.Controls;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace Hyperbar.Windows;
+
+public class TemplateFactory(ITemplateGeneratorFactory factory,
+    IEnumerable<IDataTemplateDescriptor> descriptors,
+    IServiceProvider provider) :
+    DataTemplateSelector,
+    ITemplateFactory
+{
+    protected override DataTemplate SelectTemplateCore(object item) => factory.Create();
+
+    protected override DataTemplate SelectTemplateCore(object item, DependencyObject container) => factory.Create();
+
+    public object? Create(object key)
+    {
+        if (descriptors.FirstOrDefault(x => x.Key == key) is IDataTemplateDescriptor descriptor)
+        {
+            if (provider.GetRequiredKeyedService(descriptor.TemplateType, descriptor.Key) is { } template)
+            {
+                return template;
+            }
+        }
+
+        return default;
+    }
+}