Performance Improvements and Some Polish (#1702)

* Auto scale reading timeline

* Added benchmarks for SharpImage and NetVips. When an epub has a malformed page, catch the error and present it better to the user.

* Added a hint for an upcoming feature

* Slightly sped up word count for epubs

* Added one more test to reflect actual code.

* Some light cleanup

* Use compact number for stat lists

* Fixed brightness being broken on manga reader

* Replaced CoverToWebP SharpImage version with NetVips which is MUCH lighter on memory and CPU.

* Added last modified on the progress dto for CdDisplayEx.

* Code cleanup

* Forgot one cleanup

API/DTOs/ProgressDto.cs

@@ -1,4 +1,5 @@
-using System.ComponentModel.DataAnnotations;
+using System;
+using System.ComponentModel.DataAnnotations;
 
 namespace API.DTOs;
 
@@ -19,4 +20,8 @@ public class ProgressDto
     /// on pages that combine multiple "chapters".
     /// </summary>
     public string BookScrollId { get; set; }
+    /// <summary>
+    /// Last time the progress was synced from UI or external app
+    /// </summary>
+    public DateTime LastModified { get; set; }
 }