Feature/performance pdf (#426)

#  Added
- Added: Added series format information to the search typeahead to help identify duplicate series in libraries

# Fixed
- Fixed: Fixed accent color not looking well on light theme
- Fixed: Attempted to fix the memory issues with PDF reading on Docker. Uses a Memory Pool for streams and removes a bitmap operation for fixing books with transparent backgrounds (#424)

# Changed
- Changed: Refactored download logs to use the same download code as rest of Kavita 

# Dev stuff
- Added timeout for Regex's to make sure during matching, malicious filenames doesn't crash user system
- Refactored a missing GetCoverImage to use Series Format rather than old Library Type

==================================================
* Added Timeout for Regex matching to ensure malicious filenames don't crash system

* Refactored GetCoverImage to use series format rather than library type

* Refactored download logs to use the download service

* Fixed accent color not looking well on light theme

* Refactored series format into dedicated component and added to search results

* Switch to using MemoryManager for Streams to attempt to minimize GC pressure and reduced bitmap manipulation for transparency hack.

API/Extensions/SeriesExtensions.cs

@@ -1,7 +1,6 @@
 using System.Collections.Generic;
 using System.Linq;
 using API.Entities;
-using API.Entities.Enums;
 using API.Parser;
 using API.Services.Tasks.Scanner;
 

API/Extensions/VolumeListExtensions.cs

@@ -19,12 +19,11 @@ namespace API.Extensions
         /// If there are both specials and non-specials, then the first non-special will be returned.
         /// </summary>
         /// <param name="volumes"></param>
-        /// <param name="libraryType"></param>
+        /// <param name="seriesFormat"></param>
         /// <returns></returns>
-        public static Volume GetCoverImage(this IList<Volume> volumes, LibraryType libraryType)
+        public static Volume GetCoverImage(this IList<Volume> volumes, MangaFormat seriesFormat)
         {
-            // TODO: Refactor this to use MangaFormat Epub instead
-            if (libraryType == LibraryType.Book)
+            if (seriesFormat is MangaFormat.Epub or MangaFormat.Pdf)
             {
                 return volumes.OrderBy(x => x.Number).FirstOrDefault();
             }