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

OpenArchival.DataAccess/Models/ArtifactGrouping.cs

@@ -19,6 +19,20 @@ public class ArtifactGrouping
         }
     }
 
+    public List<FilePathListing> ChildFilePathListings
+    {
+        get
+        {
+            var list = new List<FilePathListing>();
+            foreach (ArtifactEntry entry in ChildArtifactEntries)
+            {
+                list.AddRange(entry.Files);
+            }
+
+            return list;
+        }
+    }
+
     public required ArchiveCategory Category { get; set; }
 
     private IdentifierFields _identifierFields;
@@ -35,7 +49,6 @@ public class ArtifactGrouping
         }
     }
 
-
     public required string Title { get; set; }
 
     public string? Description { get; set; }