Removed Obsolete A_Property Methods

Changed GetDimensions to handle a stream at the end and one exit

Switched to using Action? over IDlibDotNet for Tick method

Switched to using AsReadOnly over new()

Moved Meta Base to Shared

Shared/Models/FilePair.cs

@@ -1,3 +1,4 @@
+using System.Collections.ObjectModel;
 using System.Text.Json;
 using System.Text.Json.Serialization;
 
@@ -6,7 +7,7 @@ namespace View_by_Distance.Shared.Models;
 public record FilePair(FilePath FilePath,
                        bool IsUnique,
                        bool? IsNotUniqueAndNeedsReview,
-                       List<FilePath> Collection,
+                       ReadOnlyCollection<FilePath> Collection,
                        FilePath? Match)
 {