Method, Variable, Class Renames in Readarr.Core

Co-Authored-By: ta264 <ta264@users.noreply.github.com>

src/NzbDrone.Core/MetadataSource/IProvideBookInfo.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using NzbDrone.Core.Books;
+
+namespace NzbDrone.Core.MetadataSource
+{
+    public interface IProvideBookInfo
+    {
+        Tuple<string, Book, List<AuthorMetadata>> GetBookInfo(string id);
+        HashSet<string> GetChangedBooks(DateTime startTime);
+    }
+}