Extracted some pages to their own assembly and finished the artifact display page code

OpenArchival.Blazor/Components/Pages/ArchiveDisplay/FileDisplayComponentFactory.cs

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+using OpenArchival.Blazor.Components.Pages.ArchiveDisplay;
+using System.Collections.Generic;
+using System.Collections.Specialized;
+
+namespace OpenArchival.Blazor;
+
+public class FileDisplayComponentFactory
+{
+    private Dictionary<string, Type> _extensionToComponents { get; set; } = [];
+    
+    public FileDisplayComponentFactory()
+    {
+        // Supported image file types taken from https://developer.mozilla.org/en-US/docs/Web/Media/Guides/Formats/Image_types
+        RegisterComponent<FileDisplayImage>(".apng");
+        RegisterComponent<FileDisplayImage>(".png");
+        RegisterComponent<FileDisplayImage>(".avif");
+        RegisterComponent<FileDisplayImage>(".gif");
+        RegisterComponent<FileDisplayImage>(".jpg");
+        RegisterComponent<FileDisplayImage>(".jpeg");
+        RegisterComponent<FileDisplayImage>(".jfif");
+        RegisterComponent<FileDisplayImage>(".pjpeg");
+        RegisterComponent<FileDisplayImage>(".pjg");
+        RegisterComponent<FileDisplayImage>(".png");
+        RegisterComponent<FileDisplayImage>(".svg");
+        RegisterComponent<FileDisplayImage>(".webp");
+    }    
+
+    private string GetExtensionKey(string pathOrExtension)
+    {
+        return Path.GetExtension(pathOrExtension).ToUpperInvariant();
+    }    
+
+    public bool RegisterComponent<ComponentType>(string filenameOrExtension) where ComponentType : IFileDisplayComponent 
+    {
+        string extensionString = GetExtensionKey(filenameOrExtension); 
+
+        _extensionToComponents.Add(extensionString, typeof(ComponentType));
+        return true;
+    }
+
+    public Type? GetDisplayComponentType(string filenameOrExtension) {
+        var result = _extensionToComponents.TryGetValue(GetExtensionKey(filenameOrExtension), out var component);
+
+        return (result) ? component : null; 
+    }
+}